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-rw-r--r--pkgs/build-support/docker/examples.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/build-support/docker/examples.nix b/pkgs/build-support/docker/examples.nix
index 090bfafa085..41eddefe32b 100644
--- a/pkgs/build-support/docker/examples.nix
+++ b/pkgs/build-support/docker/examples.nix
@@ -155,6 +155,7 @@ rec {
   layered-image = pkgs.dockerTools.buildLayeredImage {
     name = "layered-image";
     tag = "latest";
+    extraCommands = ''echo "(extraCommand)" > extraCommands'';
     config.Cmd = [ "${pkgs.hello}/bin/hello" ];
     contents = [ pkgs.hello pkgs.bash pkgs.coreutils ];
   };