diff --git a/swh/lister/arch/lister.py b/swh/lister/arch/lister.py
--- a/swh/lister/arch/lister.py
+++ b/swh/lister/arch/lister.py
@@ -453,6 +453,14 @@
                         "length": version["length"],
                     }
                 )
+                if version["version"] == origin["version"]:
+                    artifacts[-1]["checksums"] = {
+                        "md5": origin["data"]["md5sum"],
+                        "sha256": origin["data"]["sha256sum"],
+                    }
+                else:
+                    artifacts[-1]["checksums"] = {"length": version["length"]}
+
                 arch_metadata.append(
                     {
                         "version": version["version"],
diff --git a/swh/lister/arch/tests/test_lister.py b/swh/lister/arch/tests/test_lister.py
--- a/swh/lister/arch/tests/test_lister.py
+++ b/swh/lister/arch/tests/test_lister.py
@@ -3,6 +3,8 @@
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
+# flake8: noqa: B950
+
 from swh.lister.arch.lister import ArchLister
 
 expected_origins = [
@@ -12,142 +14,212 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190211-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190211-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20190211-1",
                     "length": 180000,
                     "filename": "dialog-1:1.3_20190211-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 180000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190724-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190724-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20190724-1",
                     "length": 180000,
                     "filename": "dialog-1:1.3_20190724-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 180000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190728-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190728-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20190728-1",
                     "length": 180000,
                     "filename": "dialog-1:1.3_20190728-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 180000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190806-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190806-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20190806-1",
                     "length": 182000,
                     "filename": "dialog-1:1.3_20190806-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 182000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190808-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20190808-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20190808-1",
                     "length": 182000,
                     "filename": "dialog-1:1.3_20190808-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 182000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191110-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191110-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20191110-1",
                     "length": 183000,
                     "filename": "dialog-1:1.3_20191110-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 183000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191110-2-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191110-2-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20191110-2",
                     "length": 183000,
                     "filename": "dialog-1:1.3_20191110-2-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 183000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191209-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191209-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20191209-1",
                     "length": 183000,
                     "filename": "dialog-1:1.3_20191209-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 183000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191210-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20191210-1-x86_64.pkg.tar.xz",
                     "version": "1:1.3_20191210-1",
                     "length": 184000,
                     "filename": "dialog-1:1.3_20191210-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 184000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20200228-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20200228-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20200228-1",
                     "length": 196000,
                     "filename": "dialog-1:1.3_20200228-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 196000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20200327-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20200327-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20200327-1",
                     "length": 196000,
                     "filename": "dialog-1:1.3_20200327-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 196000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20201126-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20201126-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20201126-1",
                     "length": 199000,
                     "filename": "dialog-1:1.3_20201126-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 199000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210117-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210117-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210117-1",
                     "length": 200000,
                     "filename": "dialog-1:1.3_20210117-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 200000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210306-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210306-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210306-1",
                     "length": 201000,
                     "filename": "dialog-1:1.3_20210306-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 201000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210319-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210319-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210319-1",
                     "length": 201000,
                     "filename": "dialog-1:1.3_20210319-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 201000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210324-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210324-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210324-1",
                     "length": 201000,
                     "filename": "dialog-1:1.3_20210324-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 201000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210509-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210509-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210509-1",
                     "length": 198000,
                     "filename": "dialog-1:1.3_20210509-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 198000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210530-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210530-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210530-1",
                     "length": 198000,
                     "filename": "dialog-1:1.3_20210530-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 198000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210621-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20210621-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20210621-1",
                     "length": 199000,
                     "filename": "dialog-1:1.3_20210621-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 199000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20211107-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20211107-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20211107-1",
                     "length": 197000,
                     "filename": "dialog-1:1.3_20211107-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 197000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20211214-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20211214-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20211214-1",
                     "length": 197000,
                     "filename": "dialog-1:1.3_20211214-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 197000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20220117-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20220117-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20220117-1",
                     "length": 199000,
                     "filename": "dialog-1:1.3_20220117-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 199000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20220414-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/d/dialog/dialog-1:1.3_20220414-1-x86_64.pkg.tar.zst",
                     "version": "1:1.3_20220414-1",
                     "length": 198000,
                     "filename": "dialog-1:1.3_20220414-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "md5": "06407c0cb11c50d7bf83d600f2e8107c",
+                        "sha256": "ef8c8971f591de7db0f455970ef5d81d5aced1ddf139f963f16f6730b1851fa7",
+                    },
                 },
             ],
             "arch_metadata": [
@@ -321,64 +393,95 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-1-x86_64.pkg.tar.xz",
                     "version": "1:3.16.1+15+g0fd8b5f-1",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-2-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-2-x86_64.pkg.tar.zst",
                     "version": "1:3.16.1+15+g0fd8b5f-2",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-2-x86_64.pkg.tar.zst",  # noqa: B950
+                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-2-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-3-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-3-x86_64.pkg.tar.zst",
                     "version": "1:3.16.1+15+g0fd8b5f-3",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-3-x86_64.pkg.tar.zst",  # noqa: B950
+                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-3-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-4-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-1:3.16.1+15+g0fd8b5f-4-x86_64.pkg.tar.zst",
                     "version": "1:3.16.1+15+g0fd8b5f-4",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-4-x86_64.pkg.tar.zst",  # noqa: B950
+                    "filename": "gnome-code-assistance-1:3.16.1+15+g0fd8b5f-4-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-2:3.16.1+14+gaad6437-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-2:3.16.1+14+gaad6437-1-x86_64.pkg.tar.zst",
                     "version": "2:3.16.1+14+gaad6437-1",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-2:3.16.1+14+gaad6437-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "filename": "gnome-code-assistance-2:3.16.1+14+gaad6437-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-2:3.16.1+14+gaad6437-2-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-2:3.16.1+14+gaad6437-2-x86_64.pkg.tar.zst",
                     "version": "2:3.16.1+14+gaad6437-2",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-2:3.16.1+14+gaad6437-2-x86_64.pkg.tar.zst",  # noqa: B950
+                    "filename": "gnome-code-assistance-2:3.16.1+14+gaad6437-2-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "md5": "eadcf1a6bb70a3e564f260b7fc58135a",
+                        "sha256": "6fd0c80b63d205a1edf5c39c7a62d16499e802566f2451c2b85cd28c9bc30ec7",
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3.16.1+14+gaad6437-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3.16.1+14+gaad6437-1-x86_64.pkg.tar.xz",
                     "version": "3.16.1+14+gaad6437-1",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-3.16.1+14+gaad6437-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "filename": "gnome-code-assistance-3.16.1+14+gaad6437-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3.16.1+14+gaad6437-2-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3.16.1+14+gaad6437-2-x86_64.pkg.tar.xz",
                     "version": "3.16.1+14+gaad6437-2",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-3.16.1+14+gaad6437-2-x86_64.pkg.tar.xz",  # noqa: B950
+                    "filename": "gnome-code-assistance-3.16.1+14+gaad6437-2-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3.16.1+15+gb9ffc4d-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3.16.1+15+gb9ffc4d-1-x86_64.pkg.tar.xz",
                     "version": "3.16.1+15+gb9ffc4d-1",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-3.16.1+15+gb9ffc4d-1-x86_64.pkg.tar.xz",  # noqa: B950
+                    "filename": "gnome-code-assistance-3.16.1+15+gb9ffc4d-1-x86_64.pkg.tar.xz",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3:3.16.1+r14+gaad6437-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/g/gnome-code-assistance/gnome-code-assistance-3:3.16.1+r14+gaad6437-1-x86_64.pkg.tar.zst",
                     "version": "3:3.16.1+r14+gaad6437-1",
                     "length": 2000000,
-                    "filename": "gnome-code-assistance-3:3.16.1+r14+gaad6437-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "filename": "gnome-code-assistance-3:3.16.1+r14+gaad6437-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 2000000,
+                    },
                 },
             ],
             "arch_metadata": [
@@ -461,34 +564,50 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
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+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-5.2.1-1-x86_64.pkg.tar.zst",
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+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-5.7.1-1-x86_64.pkg.tar.zst",
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                     "length": 5000000,
                     "filename": "mercurial-5.9.2-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-5.9.3-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-5.9.3-1-x86_64.pkg.tar.zst",
                     "version": "5.9.3-1",
                     "length": 5000000,
                     "filename": "mercurial-5.9.3-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0-1-x86_64.pkg.tar.zst",
                     "version": "6.0-1",
                     "length": 5000000,
                     "filename": "mercurial-6.0-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0-2-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0-2-x86_64.pkg.tar.zst",
                     "version": "6.0-2",
                     "length": 5000000,
                     "filename": "mercurial-6.0-2-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0-3-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0-3-x86_64.pkg.tar.zst",
                     "version": "6.0-3",
                     "length": 5000000,
                     "filename": "mercurial-6.0-3-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0.1-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0.1-1-x86_64.pkg.tar.zst",
                     "version": "6.0.1-1",
                     "length": 5000000,
                     "filename": "mercurial-6.0.1-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0.2-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0.2-1-x86_64.pkg.tar.zst",
                     "version": "6.0.2-1",
                     "length": 5000000,
                     "filename": "mercurial-6.0.2-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0.3-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.0.3-1-x86_64.pkg.tar.zst",
                     "version": "6.0.3-1",
                     "length": 5000000,
                     "filename": "mercurial-6.0.3-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1-1-x86_64.pkg.tar.zst",
                     "version": "6.1-1",
                     "length": 5000000,
                     "filename": "mercurial-6.1-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1-2-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1-2-x86_64.pkg.tar.zst",
                     "version": "6.1-2",
                     "length": 5000000,
                     "filename": "mercurial-6.1-2-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1.1-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1.1-1-x86_64.pkg.tar.zst",
                     "version": "6.1.1-1",
                     "length": 5000000,
                     "filename": "mercurial-6.1.1-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "length": 5000000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1.2-1-x86_64.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/m/mercurial/mercurial-6.1.2-1-x86_64.pkg.tar.zst",
                     "version": "6.1.2-1",
                     "length": 5000000,
                     "filename": "mercurial-6.1.2-1-x86_64.pkg.tar.zst",
+                    "checksums": {
+                        "md5": "037ff48bf6127e9d37ad7da7026a6dc0",
+                        "sha256": "be33e7bf800d1e84714cd40029d103873e65f5a72dea19d6ad935f3439512cf8",
+                    },
                 },
             ],
             "arch_metadata": [
@@ -1180,34 +1445,50 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.1-3-any.pkg.tar.xz",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.1-3-any.pkg.tar.xz",
                     "version": "2.6.1-3",
                     "length": 40000,
                     "filename": "python-hglib-2.6.1-3-any.pkg.tar.xz",
+                    "checksums": {
+                        "length": 40000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-1-any.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-1-any.pkg.tar.zst",
                     "version": "2.6.2-1",
                     "length": 43000,
                     "filename": "python-hglib-2.6.2-1-any.pkg.tar.zst",
+                    "checksums": {
+                        "length": 43000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-2-any.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-2-any.pkg.tar.zst",
                     "version": "2.6.2-2",
                     "length": 43000,
                     "filename": "python-hglib-2.6.2-2-any.pkg.tar.zst",
+                    "checksums": {
+                        "length": 43000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-3-any.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-3-any.pkg.tar.zst",
                     "version": "2.6.2-3",
                     "length": 43000,
                     "filename": "python-hglib-2.6.2-3-any.pkg.tar.zst",
+                    "checksums": {
+                        "length": 43000,
+                    },
                 },
                 {
-                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-4-any.pkg.tar.zst",  # noqa: B950
+                    "url": "https://archive.archlinux.org/packages/p/python-hglib/python-hglib-2.6.2-4-any.pkg.tar.zst",
                     "version": "2.6.2-4",
                     "length": 43000,
                     "filename": "python-hglib-2.6.2-4-any.pkg.tar.zst",
+                    "checksums": {
+                        "md5": "ecc6598834dc216efd938466a2425eae",
+                        "sha256": "fd273811023e8c58090d65118d27f5c10ad10ea5d1fbdbcf88c730327cea0952",
+                    },
                 },
             ],
             "arch_metadata": [
@@ -1255,10 +1536,14 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://uk.mirror.archlinuxarm.org/aarch64/core/gzip-1.12-1-aarch64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://uk.mirror.archlinuxarm.org/aarch64/core/gzip-1.12-1-aarch64.pkg.tar.xz",
                     "length": 79640,
                     "version": "1.12-1",
                     "filename": "gzip-1.12-1-aarch64.pkg.tar.xz",
+                    "checksums": {
+                        "md5": "97d1e76302213f0499f45aa4a4d329cc",
+                        "sha256": "9065fdaf21dfcac231b0e5977599b37596a0d964f48ec0a6bff628084d636d4c",
+                    },
                 }
             ],
             "arch_metadata": [
@@ -1278,10 +1563,14 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://uk.mirror.archlinuxarm.org/aarch64/extra/mercurial-6.1.3-1-aarch64.pkg.tar.xz",  # noqa: B950
+                    "url": "https://uk.mirror.archlinuxarm.org/aarch64/extra/mercurial-6.1.3-1-aarch64.pkg.tar.xz",
                     "length": 4931228,
                     "version": "6.1.3-1",
                     "filename": "mercurial-6.1.3-1-aarch64.pkg.tar.xz",
+                    "checksums": {
+                        "md5": "0464390744f42faba80c323ee7c72406",
+                        "sha256": "635edb47117e7bda0b821d86e61906c802bd880d4a30a64185d9feec1bd25db6",
+                    },
                 }
             ],
             "arch_metadata": [
@@ -1301,10 +1590,14 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://uk.mirror.archlinuxarm.org/any/community/python-hglib-2.6.2-4-any.pkg.tar.xz",  # noqa: B950
+                    "url": "https://uk.mirror.archlinuxarm.org/any/community/python-hglib-2.6.2-4-any.pkg.tar.xz",
                     "length": 41432,
                     "version": "2.6.2-4",
                     "filename": "python-hglib-2.6.2-4-any.pkg.tar.xz",
+                    "checksums": {
+                        "md5": "0f763d5e85c4ffe728153f2836838674",
+                        "sha256": "7a873e20d1822403c8ecf0c790de02439368000e9b1b74881788a9faea8c81b6",
+                    },
                 }
             ],
             "arch_metadata": [
@@ -1324,10 +1617,14 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://uk.mirror.archlinuxarm.org/armv7h/core/gzip-1.12-1-armv7h.pkg.tar.xz",  # noqa: B950
+                    "url": "https://uk.mirror.archlinuxarm.org/armv7h/core/gzip-1.12-1-armv7h.pkg.tar.xz",
                     "length": 78468,
                     "version": "1.12-1",
                     "filename": "gzip-1.12-1-armv7h.pkg.tar.xz",
+                    "checksums": {
+                        "md5": "490c9e28db91740f1adcea64cb6ec1aa",
+                        "sha256": "4ffc8bbede3bbdd9dd6ad6f85bb689b3f4b985655e56285691db2a1346eaf0e7",
+                    },
                 }
             ],
             "arch_metadata": [
@@ -1347,10 +1644,14 @@
         "extra_loader_arguments": {
             "artifacts": [
                 {
-                    "url": "https://uk.mirror.archlinuxarm.org/armv7h/extra/mercurial-6.1.3-1-armv7h.pkg.tar.xz",  # noqa: B950
+                    "url": "https://uk.mirror.archlinuxarm.org/armv7h/extra/mercurial-6.1.3-1-armv7h.pkg.tar.xz",
                     "length": 4897816,
                     "version": "6.1.3-1",
                     "filename": "mercurial-6.1.3-1-armv7h.pkg.tar.xz",
+                    "checksums": {
+                        "md5": "453effa55e32be3ef9de5a58f322b9c4",
+                        "sha256": "c1321de5890a6f53d41c1a5e339733be145221828703f13bccf3e7fc22612396",
+                    },
                 }
             ],
             "arch_metadata": [
diff --git a/swh/lister/cpan/tests/test_lister.py b/swh/lister/cpan/tests/test_lister.py
--- a/swh/lister/cpan/tests/test_lister.py
+++ b/swh/lister/cpan/tests/test_lister.py
@@ -2,6 +2,7 @@
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
+
 from swh.lister.cpan.lister import CpanLister
 
 expected_origins = [
diff --git a/swh/lister/cran/list_all_packages.R b/swh/lister/cran/list_all_packages.R
--- a/swh/lister/cran/list_all_packages.R
+++ b/swh/lister/cran/list_all_packages.R
@@ -4,6 +4,6 @@
 # all the packages of R and their description, then convert the API
 # response to JSON string and print it
 
-db <- tools::CRAN_package_db()[, c("Package", "Version", "Packaged")]
+db <- tools::CRAN_package_db()[, c("Package", "Version", "Packaged", "MD5sum")]
 dbjson <- jsonlite::toJSON(db)
 print(dbjson)
\ No newline at end of file
diff --git a/swh/lister/cran/lister.py b/swh/lister/cran/lister.py
--- a/swh/lister/cran/lister.py
+++ b/swh/lister/cran/lister.py
@@ -68,6 +68,7 @@
                             "url": artifact_url,
                             "version": package_info["Version"],
                             "package": package_info["Package"],
+                            "checksums": {"md5": package_info["MD5sum"]},
                         }
                     ]
                 },
diff --git a/swh/lister/cran/tests/data/list-r-packages.json b/swh/lister/cran/tests/data/list-r-packages.json
--- a/swh/lister/cran/tests/data/list-r-packages.json
+++ b/swh/lister/cran/tests/data/list-r-packages.json
@@ -1,40 +1,32 @@
 [
-
     {
-        "Package": "SeleMix",
-        "Version": "1.0.2",
-        "Packaged": "2020-11-28 22:16:43 UTC; Teresa"
+        "Package": "cNORM",
+        "Version": "3.0.2",
+        "Packaged": "2022-06-12 08:46:39 UTC; gbpa005",
+        "MD5sum": "d878686afc17b990e500dc88afb3a990"
     },
     {
-        "Package": "plink",
-        "Version": "1.5-1",
-        "Packaged": "2017-04-26 11:36:15 UTC; Jonathan"
+        "Package": "CNprep",
+        "Version": "2.2",
+        "Packaged": "2022-05-23 23:58:37 UTC; Astrid",
+        "MD5sum": "4b6ddc37df607c79b7fb50a96a57197f"
     },
     {
-        "Package": "jsonlite",
-        "Version": "1.7.2",
-        "Packaged": "2020-12-09 13:54:18 UTC; jeroen"
-
+        "Package": "CNPS",
+        "Version": "1.0.0",
+        "Packaged": "2021-05-21 16:55:04 UTC; Surface",
+        "MD5sum": "deac071a9387e3a296481d041e6d09ee"
     },
     {
-        "Package": "Records",
-        "Version": "1.0",
-        "Packaged": "2012-10-29 08:57:37 UTC; ripley"
+        "Package": "cns",
+        "Version": "0.1.0",
+        "Packaged": "2021-07-16 19:30:51 UTC; nfultz",
+        "MD5sum": "3ad5a474260dbacb889be461b826a73b"
     },
     {
-        "Package": "scRNAtools",
-        "Version": "1.0",
-        "Packaged": "2018-07-04 00:49:45 UTC; dell"
-    },
-    {
-        "Package": "Deriv",
-        "Version": "4.1.2",
-        "Packaged": "2020-12-10 11:12:28 UTC; sokol"
-    },
-    {
-        "Package": "BayesValidate",
-        "Version": "0.0",
-        "Packaged": "Thu Mar 30 10:48:35 2006; hornik"
+        "Package": "cnum",
+        "Version": "0.1.3",
+        "Packaged": "2021-01-11 13:24:52 UTC; Elgar",
+        "MD5sum": "3cb5ab3fdaf4277d1ebfbe147e8990e1"
     }
-
 ]
\ No newline at end of file
diff --git a/swh/lister/cran/tests/test_lister.py b/swh/lister/cran/tests/test_lister.py
--- a/swh/lister/cran/tests/test_lister.py
+++ b/swh/lister/cran/tests/test_lister.py
@@ -109,6 +109,7 @@
                     "url": artifact_url,
                     "version": package_info["Version"],
                     "package": package_info["Package"],
+                    "checksums": {"md5": package_info["MD5sum"]},
                 }
             ]
         }
diff --git a/swh/lister/puppet/lister.py b/swh/lister/puppet/lister.py
--- a/swh/lister/puppet/lister.py
+++ b/swh/lister/puppet/lister.py
@@ -80,6 +80,18 @@
             for release in entry["releases"]:
                 # Build an artifact entry following original-artifacts-json specification
                 # https://docs.softwareheritage.org/devel/swh-storage/extrinsic-metadata-specification.html#original-artifacts-json  # noqa: B950
+                checksums = {}
+
+                if release["version"] == entry["current_release"]["version"]:
+                    # checksums are only available for current release
+                    for checksum in ("md5", "sha256"):
+                        checksums[checksum] = entry["current_release"][
+                            f"file_{checksum}"
+                        ]
+                else:
+                    # use file length as basic content check instead
+                    checksums["length"] = release["file_size"]
+
                 artifacts[release["version"]] = {
                     "filename": release["file_uri"].split("/")[-1],
                     "url": urljoin(self.BASE_URL, release["file_uri"]),
@@ -87,6 +99,7 @@
                     "last_update": datetime.strptime(
                         release["created_at"], dt_parse_pattern
                     ).isoformat(),
+                    "checksums": checksums,
                 }
 
             yield ListedOrigin(
diff --git a/swh/lister/puppet/tests/test_lister.py b/swh/lister/puppet/tests/test_lister.py
--- a/swh/lister/puppet/tests/test_lister.py
+++ b/swh/lister/puppet/tests/test_lister.py
@@ -2,60 +2,87 @@
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
+
 from swh.lister.puppet.lister import PuppetLister
 
+# flake8: noqa: B950
+
 expected_origins = {
     "https://forge.puppet.com/modules/electrical/file_concat": {
         "artifacts": {
             "1.0.0": {
-                "url": "https://forgeapi.puppet.com/v3/files/electrical-file_concat-1.0.0.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/electrical-file_concat-1.0.0.tar.gz",
                 "version": "1.0.0",
                 "filename": "electrical-file_concat-1.0.0.tar.gz",
                 "last_update": "2015-04-09T12:03:13-07:00",
+                "checksums": {
+                    "length": 13289,
+                },
             },
             "1.0.1": {
-                "url": "https://forgeapi.puppet.com/v3/files/electrical-file_concat-1.0.1.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/electrical-file_concat-1.0.1.tar.gz",
                 "version": "1.0.1",
                 "filename": "electrical-file_concat-1.0.1.tar.gz",
                 "last_update": "2015-04-17T01:03:46-07:00",
+                "checksums": {
+                    "md5": "74901a89544134478c2dfde5efbb7f14",
+                    "sha256": "15e973613ea038d8a4f60bafe2d678f88f53f3624c02df3157c0043f4a400de6",
+                },
             },
         }
     },
     "https://forge.puppet.com/modules/puppetlabs/puppetdb": {
         "artifacts": {
             "1.0.0": {
-                "url": "https://forgeapi.puppet.com/v3/files/puppetlabs-puppetdb-1.0.0.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/puppetlabs-puppetdb-1.0.0.tar.gz",
                 "version": "1.0.0",
                 "filename": "puppetlabs-puppetdb-1.0.0.tar.gz",
                 "last_update": "2012-09-19T16:51:22-07:00",
+                "checksums": {
+                    "length": 16336,
+                },
             },
             "7.9.0": {
-                "url": "https://forgeapi.puppet.com/v3/files/puppetlabs-puppetdb-7.9.0.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/puppetlabs-puppetdb-7.9.0.tar.gz",
                 "version": "7.9.0",
                 "filename": "puppetlabs-puppetdb-7.9.0.tar.gz",
                 "last_update": "2021-06-24T07:48:54-07:00",
+                "checksums": {
+                    "length": 42773,
+                },
             },
             "7.10.0": {
-                "url": "https://forgeapi.puppet.com/v3/files/puppetlabs-puppetdb-7.10.0.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/puppetlabs-puppetdb-7.10.0.tar.gz",
                 "version": "7.10.0",
                 "filename": "puppetlabs-puppetdb-7.10.0.tar.gz",
                 "last_update": "2021-12-16T14:57:46-08:00",
+                "checksums": {
+                    "md5": "e91a2074ca8d94a8b3ff7f6c8bbf12bc",
+                    "sha256": "49b1a542fbd2a1378c16cb04809e0f88bf4f3e45979532294fb1f03f56c97fbb",
+                },
             },
         }
     },
     "https://forge.puppet.com/modules/saz/memcached": {
         "artifacts": {
             "1.0.0": {
-                "url": "https://forgeapi.puppet.com/v3/files/saz-memcached-1.0.0.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/saz-memcached-1.0.0.tar.gz",
                 "version": "1.0.0",
                 "filename": "saz-memcached-1.0.0.tar.gz",
                 "last_update": "2011-11-20T13:40:30-08:00",
+                "checksums": {
+                    "length": 2472,
+                },
             },
             "8.1.0": {
-                "url": "https://forgeapi.puppet.com/v3/files/saz-memcached-8.1.0.tar.gz",  # noqa: B950
+                "url": "https://forgeapi.puppet.com/v3/files/saz-memcached-8.1.0.tar.gz",
                 "version": "8.1.0",
                 "filename": "saz-memcached-8.1.0.tar.gz",
                 "last_update": "2022-07-11T03:34:55-07:00",
+                "checksums": {
+                    "md5": "aadf80fba5848909429eb002ee1927ea",
+                    "sha256": "883d6186e91c2c3fed13ae2009c3aa596657f6707b76f1f7efc6203c6e4ae986",
+                },
             },
         }
     },