diff --git a/flake.nix b/flake.nix
index b8d4312..d55f7ec 100644
--- a/flake.nix
+++ b/flake.nix
@@ -130,12 +130,10 @@
                 ''mkdir -p /var/tmp''
               ];
               script = [
-                ''
-                  buildah manifest create localhost/nix-coder-image \
-                  ${lib.concatStrings (
-                    builtins.map (sys: "docker-archive:dist/nix-coder-image_${sys}.tar.gz \\") SYSTEMS
-                  )}
-                ''
+                (lib.concatStringsSep " " (
+                  ["buildah manifest create localhost/nix-coder-image"]
+                  ++ builtins.map (sys: "docker-archive:dist/nix-coder-image_${sys}.tar.gz ") SYSTEMS
+                ))
                 ''
                   buildah manifest push --all localhost/nix-coder-image \
                     docker://''${CI_REGISTRY_IMAGE}/nix-coder-image:$CI_COMMIT_SHORT_SHA