diff --git i/pkgs/applications/networking/cluster/hetzner-kube/default.nix w/pkgs/applications/networking/cluster/hetzner-kube/default.nix
index 98edd849bac..dbd2359d046 100644
--- i/pkgs/applications/networking/cluster/hetzner-kube/default.nix
+++ w/pkgs/applications/networking/cluster/hetzner-kube/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
 
 buildGoModule rec {
   pname = "hetzner-kube";
@@ -13,6 +13,17 @@ buildGoModule rec {
 
   vendorSha256 = "1jh2f66ys6rmrrwrf5zqfprgcvziyq6l4z8bfqwxgf1ysnxx525h";
 
+  nativeBuildInputs = [
+    installShellFiles
+  ];
+
+  postInstall = ''
+    $out/bin/hetzner-kube completion bash > hetzner-kube
+    $out/bin/hetzner-kube completion zsh > _hetzner-kube
+    installShellCompletion --zsh _hetzner-kube
+    installShellCompletion --bash hetzner-kube
+  '';
+
   buildFlagsArray = ''
     -ldflags=
     -X github.com/xetys/hetzner-kube/cmd.version=${version}
@@ -25,4 +36,4 @@ buildGoModule rec {
     maintainers = with lib.maintainers; [ eliasp ];
     platforms = lib.platforms.unix;
   };
-}
\ No newline at end of file
+}