diff --git a/data/hostname/kafka1.internal.softwareheritage.org.yaml b/data/hostname/kafka1.internal.softwareheritage.org.yaml
index 3aeb36ef..cd6149b7 100644
--- a/data/hostname/kafka1.internal.softwareheritage.org.yaml
+++ b/data/hostname/kafka1.internal.softwareheritage.org.yaml
@@ -1,9 +1,21 @@
 ---
 backups::exclude:
   - srv/kafka
 
 nginx::worker_processes: 32
 
 swh::apt_config::enable_non_free: true
 packages:
   - intel-microcode
+
+swh::apt_config::backported_packages:
+  buster:
+    - linux-image-amd64
+    - linux-headers-amd64
+    - libnvpair1linux
+    - libuutil1linux
+    - libzfs2linux
+    - libzpool2linux
+    - zfs-dkms
+    - zfsutils-linux
+    - zfs-zed
diff --git a/data/hostname/kafka2.internal.softwareheritage.org.yaml b/data/hostname/kafka2.internal.softwareheritage.org.yaml
index 3aeb36ef..cd6149b7 100644
--- a/data/hostname/kafka2.internal.softwareheritage.org.yaml
+++ b/data/hostname/kafka2.internal.softwareheritage.org.yaml
@@ -1,9 +1,21 @@
 ---
 backups::exclude:
   - srv/kafka
 
 nginx::worker_processes: 32
 
 swh::apt_config::enable_non_free: true
 packages:
   - intel-microcode
+
+swh::apt_config::backported_packages:
+  buster:
+    - linux-image-amd64
+    - linux-headers-amd64
+    - libnvpair1linux
+    - libuutil1linux
+    - libzfs2linux
+    - libzpool2linux
+    - zfs-dkms
+    - zfsutils-linux
+    - zfs-zed
diff --git a/data/hostname/kafka3.internal.softwareheritage.org.yaml b/data/hostname/kafka3.internal.softwareheritage.org.yaml
index 3aeb36ef..cd6149b7 100644
--- a/data/hostname/kafka3.internal.softwareheritage.org.yaml
+++ b/data/hostname/kafka3.internal.softwareheritage.org.yaml
@@ -1,9 +1,21 @@
 ---
 backups::exclude:
   - srv/kafka
 
 nginx::worker_processes: 32
 
 swh::apt_config::enable_non_free: true
 packages:
   - intel-microcode
+
+swh::apt_config::backported_packages:
+  buster:
+    - linux-image-amd64
+    - linux-headers-amd64
+    - libnvpair1linux
+    - libuutil1linux
+    - libzfs2linux
+    - libzpool2linux
+    - zfs-dkms
+    - zfsutils-linux
+    - zfs-zed
diff --git a/data/hostname/kafka4.internal.softwareheritage.org.yaml b/data/hostname/kafka4.internal.softwareheritage.org.yaml
index 3aeb36ef..cd6149b7 100644
--- a/data/hostname/kafka4.internal.softwareheritage.org.yaml
+++ b/data/hostname/kafka4.internal.softwareheritage.org.yaml
@@ -1,9 +1,21 @@
 ---
 backups::exclude:
   - srv/kafka
 
 nginx::worker_processes: 32
 
 swh::apt_config::enable_non_free: true
 packages:
   - intel-microcode
+
+swh::apt_config::backported_packages:
+  buster:
+    - linux-image-amd64
+    - linux-headers-amd64
+    - libnvpair1linux
+    - libuutil1linux
+    - libzfs2linux
+    - libzpool2linux
+    - zfs-dkms
+    - zfsutils-linux
+    - zfs-zed