anchor.diff:  { stdenv
   , fetchurl
  +, help2man
   , lib
  +, meson
  +, ninja
   
   , cairo
   , fontconfig
  
positive.code:     sha256 = "517645c00c4554e82c0631e836659504d3fd3699c564c633fccfdfd37574e278";
    };
  
    buildInputs = [
      cairo
      fontconfig
  
negative.code: 
  let
    inherit (lib)
      optionals
      optionalString;
  
  