diff --git a/default.nix b/default.nix
index d468ad1..a686e5b 100644
--- a/default.nix
+++ b/default.nix
@@ -11,5 +11,5 @@ let
   pkgs' = import ./overlay.nix pkgs null;
 in
 {
-	catwalk = pkgs'.catppuccin-catwalk;
+  catwalk = pkgs'.catppuccin-catwalk;
 }
diff --git a/overlay.nix b/overlay.nix
index c739678..c44f40f 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -1,6 +1,10 @@
 final: _: {
   catppuccin-catwalk = final.callPackage (
-    { lib, rustPlatform }:
+    {
+      lib,
+      rustPlatform,
+      installShellFiles,
+    }:
     rustPlatform.buildRustPackage {
       pname = "catppuccin-catwalk";
       inherit ((lib.importTOML ./Cargo.toml).package) version;
@@ -19,6 +23,15 @@ final: _: {
 
       cargoLock.lockFile = ./Cargo.lock;
 
+      nativeBuildInputs = [ installShellFiles ];
+
+      postInstall = ''
+        installShellCompletion --cmd catwalk \
+          --bash <("$out/bin/catwalk" completion bash) \
+          --zsh <("$out/bin/catwalk" completion zsh) \
+          --fish <("$out/bin/catwalk" completion fish)
+      '';
+
       meta = {
         homepage = "https://github.com/catppuccin/catwalk";
         description = "🚶 Soothing pastel previews for the high-spirited!";
diff --git a/shell.nix b/shell.nix
index e1586cb..54ec739 100644
--- a/shell.nix
+++ b/shell.nix
@@ -14,7 +14,7 @@ pkgs.mkShell {
     clippy
     rustfmt
     rust-analyzer
-    
+
     # wasm support
     llvmPackages.bintools
     just