anchor.diff:  in
     stdenv.mkDerivation rec {
       name = "glava-${version}";
  -    version = "1.5.1";
  +    version = "1.5.5";
   
       src = fetchgit {
         url = "https://github.com/wacossusca34/glava.git";
         rev = "v${version}";
  -      sha256 = "1k8x0a0g2pm7ficsk4az9s7mjbm85a987apjg5c4y6iyldxgd6sb";
  +      sha256 = "0mpbgllwz45wkax6pgvnh1pz2q4yvbzq2l8z8kff13wrsdvl8lh0";
       };
   
       buildInputs = [
  
positive.code:       python3
      ];
  
      patchPhase = ''
        mkdir -p glad/include/KHR
  
        cp ${gl} glad/gl.xml
        cp ${egl} glad/include/KHR/khrplatform.h
        patchShebangs .
      '';
  
      makeFlags = optional (!enableGlfw) "DISABLE_GLFW=1";
  
negative.code: 
  let
    inherit (stdenv.lib) optional makeLibraryPath;
  
    wrapperScript = writeScript "glava" ''
      #!${stdenv.shell}
  