build-arm64.yml: initramfs without kmod-v4l2loopback

Run 22 got through every package install and stopped in 19-initramfs.sh,
which asks rpm for kmod-v4l2loopback's files; the arm64 stand-in akmods
has no kmods. dracut --remove none builds fine (checked on Fedora 44).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.forgejo/workflows/build-arm64.yml

@@ -61,13 +61,18 @@ jobs:
             $files
           git update-index --skip-worktree $files
 
-      - name: Drop x86-only packages
-        # Fedora builds these for x86_64 only, and upstream lists them for
-        # every arch. Checked against Fedora 44 + negativo17's aarch64 repos
-        # (2026-11-04): just intel-compute-runtime.
+      - name: Adapt the build scripts to arm64
+        # 01-packages.sh: drop what Fedora builds for x86_64 only. Checked
+        # against Fedora 44 + negativo17's aarch64 repos (2026-11-04): just
+        # intel-compute-runtime.
+        # 19-initramfs.sh: it asks rpm for kmod-v4l2loopback's files, which
+        # fails without the package, and the stand-in akmods has no kmods.
+        # "none" keeps dracut's --remove argument in place, naming no module.
         run: |
           sed -i -E '/^[[:space:]]*intel-compute-runtime[[:space:]]*$/d' build_scripts/base/01-packages.sh
-          git update-index --skip-worktree build_scripts/base/01-packages.sh
+          sed -i 's|^V4L2_PATH="$(rpm -ql kmod-v4l2loopback)"$|V4L2_PATH="$(rpm -q --quiet kmod-v4l2loopback \&\& rpm -ql kmod-v4l2loopback \|\| echo none)"|' build_scripts/base/19-initramfs.sh
+          grep -q 'echo none' build_scripts/base/19-initramfs.sh
+          git update-index --skip-worktree build_scripts/base/01-packages.sh build_scripts/base/19-initramfs.sh
 
       - name: Log in to the registry
         env: