diff --git a/swh/lister/nixguix/lister.py b/swh/lister/nixguix/lister.py
--- a/swh/lister/nixguix/lister.py
+++ b/swh/lister/nixguix/lister.py
@@ -293,6 +293,21 @@
             else None
         )
 
+    def build_artifact(
+        self, artifact_url: str, artifact_type: str, artifact_ref: Optional[str] = None
+    ) -> Optional[Tuple[ArtifactType, VCS]]:
+        """Build a canonicalized vcs artifact when possible."""
+        origin = (
+            self.github_session.get_canonical_url(artifact_url)
+            if self.github_session
+            else artifact_url
+        )
+        if not origin:
+            return None
+        return ArtifactType.VCS, VCS(
+            origin=origin, type=artifact_type, ref=artifact_ref
+        )
+
     def get_pages(self) -> Iterator[PageResult]:
         """Yield one page per "typed" origin referenced in manifest."""
         # fetch and parse the manifest...
@@ -321,16 +336,12 @@
             if artifact_type in VCS_SUPPORTED:
                 plain_url = artifact[VCS_KEYS_MAPPING[artifact_type]["url"]]
                 plain_ref = artifact[VCS_KEYS_MAPPING[artifact_type]["ref"]]
-                artifact_url = (
-                    self.github_session.get_canonical_url(plain_url)
-                    if self.github_session
-                    else plain_url
+                built_artifact = self.build_artifact(
+                    plain_url, artifact_type, plain_ref
                 )
-                if not artifact_url:
+                if not built_artifact:
                     continue
-                yield ArtifactType.VCS, VCS(
-                    origin=artifact_url, type=artifact_type, ref=plain_ref
-                )
+                yield built_artifact
             elif artifact_type == "url":
                 # It's either a tarball or a file
                 origin_urls = artifact.get("urls")
@@ -354,6 +365,13 @@
 
                 origin, *fallback_urls = urls
 
+                if origin.endswith(".git"):
+                    built_artifact = self.build_artifact(origin, "git")
+                    if not built_artifact:
+                        continue
+                    yield built_artifact
+                    continue
+
                 integrity = artifact.get("integrity")
                 if integrity is None:
                     logger.warning("Skipping url <%s>: missing integrity field", origin)
@@ -367,17 +385,12 @@
                     )
                     urlparsed = urlparse(origin)
                     artifact_type = urlparsed.scheme
+
                     if artifact_type in VCS_SUPPORTED:
-                        artifact_url = (
-                            self.github_session.get_canonical_url(origin)
-                            if self.github_session
-                            else origin
-                        )
-                        if not artifact_url:
+                        built_artifact = self.build_artifact(origin, artifact_type)
+                        if not built_artifact:
                             continue
-                        yield ArtifactType.VCS, VCS(
-                            origin=artifact_url, type=artifact_type
-                        )
+                        yield built_artifact
                     else:
                         logger.warning(
                             "Skipping url <%s>: undetected remote artifact type", origin
diff --git a/swh/lister/nixguix/tests/data/nixpkgs-swh_sources.json b/swh/lister/nixguix/tests/data/nixpkgs-swh_sources.json
--- a/swh/lister/nixguix/tests/data/nixpkgs-swh_sources.json
+++ b/swh/lister/nixguix/tests/data/nixpkgs-swh_sources.json
@@ -57,6 +57,13 @@
       "integrity": "sha256-j7xp1svMeYIm+WScVe/B7w0jNjMtvkp9a1hLLLlO92g=",
       "inferredFetcher": "fetchzip"
     },
+    {
+      "type": "url",
+      "urls": [
+        "https://github.com/trie/trie.git"
+      ],
+      "integrity": "sha256-j7xp1svMeYIm+WScVe/B7w0jNjMtvkp9a1hLLLlO92g="
+    },
     {
       "type": "git",
       "git_url": "https://example.org/pali/0xffff",
diff --git a/swh/lister/nixguix/tests/test_lister.py b/swh/lister/nixguix/tests/test_lister.py
--- a/swh/lister/nixguix/tests/test_lister.py
+++ b/swh/lister/nixguix/tests/test_lister.py
@@ -169,6 +169,10 @@
         url,
         [{"json": response}],
     )
+    requests_mock.get(
+        "https://api.github.com/repos/trie/trie",
+        [{"json": {"html_url": "https://github.com/trie/trie.git"}}],
+    )
 
     expected_visit_types = defaultdict(int)
     # origin upstream is added as origin
@@ -186,7 +190,9 @@
             expected_visit_types[artifact_type] += 1
         elif artifact_type == "url":
             url = artifact["urls"][0]
-            if url.endswith(".c") or url.endswith(".txt"):
+            if url.endswith(".git"):
+                expected_visit_types["git"] += 1
+            elif url.endswith(".c") or url.endswith(".txt"):
                 expected_visit_types["content"] += 1
             elif url.startswith("svn"):  # mistyped artifact rendered as vcs nonetheless
                 expected_visit_types["svn"] += 1