anchor.diff:    libxcb = attrs : attrs // {
       nativeBuildInputs = [ args.python ];
       configureFlags = "--enable-xkb --enable-xinput";
  -    outputs = [ "dev" "out" "doc" "man" ];
  +    outputs = [ "dev" "out" "doc" ];
     };
   
     xcbproto = attrs : attrs // {
  
positive.code:   };
  
    libXrandr = attrs: attrs // {
      outputs = [ "dev" "out" "man" ];
      preConfigure = setMalloc0ReturnsNullCrossCompiling;
      propagatedBuildInputs = [xorg.libXrender];
    };
  
negative.code:   };
  
    libXcursor = attrs: attrs // {
      outputs = [ "dev" "out" ];
    };
  
    libXdamage = attrs: attrs // {
  