diff --git a/pkgs/development/tools/misc/complgen/default.nix b/pkgs/development/tools/misc/complgen/default.nix
index bed4dae43f62..ac49d7446bab 100644
--- a/pkgs/development/tools/misc/complgen/default.nix
+++ b/pkgs/development/tools/misc/complgen/default.nix
@@ -5,16 +5,21 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "complgen";
-  version = "0.1.2";
+  version = "0.1.3";
 
   src = fetchFromGitHub {
     owner = "adaszko";
     repo = "complgen";
     rev = "v${version}";
-    hash = "sha256-x6r6sLdPIpf1mLRu8gT94fGoaCtnjpUIlEbMt6uSBR8=";
+    hash = "sha256-YKJleWnUZodPuJcWX8w06PH6q1SzeUXL8AjYr9i7+sY=";
   };
 
-  cargoHash = "sha256-jljrT8OymXx8OKxWU3rE52Nw5Fw9XFmgXaOMxdzMTe4=";
+  cargoHash = "sha256-ytwhIcm4NeHDRzKNHaxo4ke+gridXKmiKHkPnACXV8o=";
+
+  # Cargo.lock is outdated
+  postConfigure = ''
+    cargo metadata --offline
+  '';
 
   meta = with lib; {
     description = "Generate {bash,fish,zsh} completions from a single EBNF-like grammar";