diff --git a/pkgs/development/tools/ytt/default.nix b/pkgs/development/tools/ytt/default.nix
index b75a78e57b59..8adf3a9d4e79 100644
--- a/pkgs/development/tools/ytt/default.nix
+++ b/pkgs/development/tools/ytt/default.nix
@@ -1,4 +1,5 @@
-{ lib, buildGoModule, fetchFromGitHub }:
+{ lib, buildGoModule, fetchFromGitHub, installShellFiles }:
+
 buildGoModule rec {
   pname = "ytt";
   version = "0.45.3";
@@ -12,12 +13,21 @@ buildGoModule rec {
 
   vendorHash = null;
 
+  nativeBuildInputs = [ installShellFiles ];
+
   ldflags = [
     "-X github.com/vmware-tanzu/carvel-ytt/pkg/version.Version=${version}"
   ];
 
   subPackages = [ "cmd/ytt" ];
 
+  postInstall = ''
+    installShellCompletion --cmd ytt \
+      --bash <($out/bin/ytt completion bash) \
+      --fish <($out/bin/ytt completion fish) \
+      --zsh <($out/bin/ytt completion zsh)
+  '';
+
   meta = with lib; {
     description = "YAML templating tool that allows configuration of complex software via reusable templates with user-provided values";
     homepage = "https://get-ytt.io";