anchor.diff:  { stdenv
   , cmake
   , fetchFromGitHub
  +, lib
   , ninja
   
   , chck
  
positive.code:     xorg.pixman
      xorg.xcbutilimage
      xorg.xcbutilwm
      xproto
    ];
  
    cmakeFlags = [
  
negative.code: , wayland
  , wayland-protocols
  , xorg
  , xorgproto
  }:
  
  let
  