diff --git a/mkosi/mkosi.images/build/mkosi.conf.d/opensuse/mkosi.build.chroot b/mkosi/mkosi.images/build/mkosi.conf.d/opensuse/mkosi.build.chroot
index 864b403dd8..54dad2ad5e 100755
--- a/mkosi/mkosi.images/build/mkosi.conf.d/opensuse/mkosi.build.chroot
+++ b/mkosi/mkosi.images/build/mkosi.conf.d/opensuse/mkosi.build.chroot
@@ -120,7 +120,7 @@ if ! build; then
         exit 1
     fi
 
-    grep -v ".debug" /tmp/unpackaged-files >>"pkg/$PKG_SUBDIR${GIT_SUBDIR:+/$GIT_SUBDIR}/files.systemd"
+    grep -v "\.debug" /tmp/unpackaged-files >>"pkg/$PKG_SUBDIR${GIT_SUBDIR:+/$GIT_SUBDIR}/files.systemd"
     build --noprep --nocheck
 fi