gl2ps: fix build with cmake v4

pkgs/by-name/gl/gl2ps/package.nix

···
     sha256 = "1sgzv547h7hrskb9qd0x5yp45kmhvibjwj2mfswv95lg070h074d";
   };
 
+  # fix build with cmake v4
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail 'cmake_minimum_required(VERSION 2.8 FATAL_ERROR)' 'cmake_minimum_required(VERSION 3.10)'
+  '';
+
   nativeBuildInputs = [
     cmake
   ];