anchor.diff:  
     buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
   
  -  cargoSha256 = "1r2fiwcjf739rkprrwidgsd9i5pjgk723ipazmlccz2jpwbrk7zr";
  +  cargoSha256 = "1fsfjavad1cbq1xvck2j5vyppxck606cpmqrwbs4fjvdmlbgx3gp";
   
     # Some tests fail because they need network access.
     # However, Travis ensures a proper build.
  
positive.code:         owner = "sagiegurari";
          repo = pname;
          rev = version;
          sha256 = "0hf8g91iv4c856whaaqrv5s8z56gi3086pva6vdwmn75gwxkw7zk";
        };
        cargo-lock = fetchurl {
          url = "https://gist.githubusercontent.com/xrelkd/e4c9c7738b21f284d97cb7b1d181317d/raw/8b4ca42376199d4e4781473b4112ef8f18bbd1cc/cargo-make-Cargo.lock";
          sha256 = "1zffq7r1cnzdqw4d3vdvlwj56pfak9gj14ibn1g0j7lncwxw2dgs";
        };
      in
      runCommand "cargo-make-src" {} ''
  
negative.code: 
  rustPlatform.buildRustPackage rec {
    pname = "cargo-make";
    version = "0.21.0";
  
    src =
      let
  