diff --git a/pkgs/tools/misc/watchexec/default.nix b/pkgs/tools/misc/watchexec/default.nix
index dea4478581b6..9729f110bb74 100644
--- a/pkgs/tools/misc/watchexec/default.nix
+++ b/pkgs/tools/misc/watchexec/default.nix
@@ -1,20 +1,27 @@
-{ stdenv, rustPlatform, fetchFromGitHub, CoreServices }:
+{ stdenv, rustPlatform, fetchFromGitHub, CoreServices, installShellFiles }:
 
 rustPlatform.buildRustPackage rec {
   pname = "watchexec";
-  version = "1.11.1";
+  version = "1.12.0";
 
   src = fetchFromGitHub {
     owner = pname;
     repo = pname;
     rev = version;
-    sha256 = "1iaib7yvxyn3l9kiys9x7wziixj13fmx1z3wgdy6h8c7jv6fpc0j";
+    sha256 = "03s9nsss4895x4lp90y65jajavk8c2nj1jjnmx0vbbwl210ghlv1";
   };
 
-  cargoSha256 = "101p0qj7ydfhqfz402mxy4bs48vq3rzgj513f1kwv0ba4hn1sxkv";
+  cargoSha256 = "07whi9w51ddh8s7v06c3k6n5q9gfx74rdkhgfysi180y2rgnbanj";
+
+  nativeBuildInputs = [ installShellFiles ];
 
   buildInputs = stdenv.lib.optionals stdenv.isDarwin [ CoreServices ];
 
+  postInstall = ''
+    installManPage doc/watchexec.1
+    installShellCompletion --zsh --name _watchexec completions/zsh
+  '';
+
   meta = with stdenv.lib; {
     description = "Executes commands in response to file modifications";
     homepage = https://github.com/watchexec/watchexec;