diff --git a/flake.lock b/flake.lock
index f5da24b..c699477 100644
--- a/flake.lock
+++ b/flake.lock
@@ -18,11 +18,11 @@
     },
     "flake-utils": {
       "locked": {
-        "lastModified": 1653893745,
-        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
         "type": "github"
       },
       "original": {
@@ -33,11 +33,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1655319683,
-        "narHash": "sha256-oeaucIu0Re7du7AGP1Y+yPqRghO+WyC6DagqaDpI7do=",
+        "lastModified": 1666867875,
+        "narHash": "sha256-3nD7iQXd/J6KjkT8IjozTuA5p8qjiLKTxvOUmH+AzNM=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "9e74ccc250321dea913219f9ce4ed2cdbdeecfde",
+        "rev": "c132d0837dfb9035701dcd8fc91786c605c855c3",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index b5218cb..b82d404 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,11 +20,22 @@
           version = "0.2.0";
           src = ./.;
           vendorSha256 = "sha256-ia0Z9yz2LrRAd9huncFtl/a6R3/gRpqbg6TdnauvEmQ=";
+          nativeBuildInputs = with pkgs; [
+            tmux
+            installShellFiles
+          ];
+
+          postInstall = ''
+            for shell in bash fish zsh; do
+              $out/bin/workon completion $shell > workon.$shell
+              installShellCompletion --$shell workon.$shell
+            done
+          '';
         };
 
-        defaultPackage = self.packages.${system}.workon;
+        packages.default = self.packages.${system}.workon;
 
-        devShell = pkgs.mkShell {
+        devShells.default = pkgs.mkShell {
           name = "workon";
           buildInputs = with pkgs; [ go gopls ];
         };