diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index b3db68a665dc..5f0a23853e4e 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -438,7 +438,7 @@ rec {
                      < image/repositories)
 
           for l in image/*/layer.tar; do
-            ls_tar image/*/layer.tar >> baseFiles
+            ls_tar $l >> baseFiles
           done
         fi