diff --git a/pkgs/applications/networking/cluster/velero/default.nix b/pkgs/applications/networking/cluster/velero/default.nix
index f5672820601d..a25d8d504bcf 100644
--- a/pkgs/applications/networking/cluster/velero/default.nix
+++ b/pkgs/applications/networking/cluster/velero/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
+{ lib, stdenv, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "velero";
@@ -31,7 +31,7 @@ buildGoModule rec {
   '';
 
   nativeBuildInputs = [ installShellFiles ];
-  postInstall = ''
+  postInstall = lib.optionalString (stdenv.hostPlatform == stdenv.buildPlatform) ''
     $out/bin/velero completion bash > velero.bash
     $out/bin/velero completion zsh > velero.zsh
     installShellCompletion velero.{bash,zsh}