anchor.diff:  , writeText
   , meson
   , ninja
  -, git
  +, pkg-config
   }:
   
   let
  
positive.code:     sha256 = "0n1m41aapr58rb1ffvfkjq6c6w3f0ynjzzhja50s4di98p4m7y0q";
    };
  
    nativeBuildInputs = [
      meson
      ninja
    ];
  
    mesonFlags = [
  
negative.code: { stdenv
  , fetchFromGitHub
  , fetchpatch
  , substituteAll
  , writeScript
  , pantheon
  