diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 868e6c2..59ca285 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,7 +14,7 @@ build-images:
       - echo debian/preseed.cfg | cpio -H newc -o -A -F isofiles/install.amd/initrd
       - cp debian/*.cfg isofiles/isolinux
       - gzip isofiles/install.amd/initrd
-      - find -follow -type f ! -name md5sum.txt -print0 | xargs -0 md5sum > md5sum.txt
+      - sh -c "find -follow -type f ! -name md5sum.txt -print0 | xargs -0 md5sum > md5sum.txt"
       - chmod -w -R isofiles/
       - genisoimage -r -J -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o halia-debian-11.3.0-amd64.iso isofiles
     artifacts: