diff --git a/pkgs/servers/roadrunner/default.nix b/pkgs/servers/roadrunner/default.nix
index 531dfb9b7ee5..bfe716b5aa51 100644
--- a/pkgs/servers/roadrunner/default.nix
+++ b/pkgs/servers/roadrunner/default.nix
@@ -30,8 +30,8 @@ buildGoModule rec {
   postInstall = ''
     installShellCompletion --cmd rr \
       --bash <($out/bin/rr completion bash) \
-      --zsh <($out/bin/rr zsh) \
-      --fish <($out/bin/rr fish)
+      --zsh <($out/bin/rr completion zsh) \
+      --fish <($out/bin/rr completion fish)
   '';
 
   postPatch = ''