diff --git a/pkgs/applications/networking/cluster/kompose/default.nix b/pkgs/applications/networking/cluster/kompose/default.nix
index 09a69f4b80e..2467ed93b32 100644
--- a/pkgs/applications/networking/cluster/kompose/default.nix
+++ b/pkgs/applications/networking/cluster/kompose/default.nix
@@ -15,9 +15,10 @@ buildGoPackage rec {
 
   nativeBuildInputs = [ installShellFiles ];
   postInstall = ''
-    $bin/bin/kompose completion bash > kompose.bash
-    $bin/bin/kompose completion zsh > kompose.zsh
-    installShellCompletion kompose.{bash,zsh}
+    for shell in bash zsh; do
+      $bin/bin/kompose completion $shell > kompose.$shell
+      installShellCompletion kompose.$shell
+    done
   '';
 
   meta = with lib; {