anchor.diff:  
     buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
   
  -  cargoSha256 = "0j7gyg6l428gypjpfgdz082vz8m86cx1wy2r47az3sc3skl6dhkq";
  +  cargoSha256 = "1hmfg3x9p5a2vz2r3v8m5wgyabbybl5lcjvi930b9wi5cnfm756g";
   
     # Some tests fail because they need network access.
     # However, Travis ensures a proper build.
  
positive.code:         owner = "sagiegurari";
          repo = pname;
          rev = version;
          sha256 = "1bv5gv5zd9h0yw7wb28r0c4z9wqa6n7ac4ipd855apwz1v7sm9n3";
        };
        cargo-lock = fetchurl {
          url = "https://gist.githubusercontent.com/xrelkd/e4c9c7738b21f284d97cb7b1d181317d/raw/8a12a07cafeff4ef4a01983f5243dd8c95d10c48/cargo-make-0.19.1-Cargo.lock";
          sha256 = "0v2hygkpsyjcpzrgyzl5mah0y8gmprfbnz7kn4hh6zfhz2lhqqwm";
        };
      in
      runCommand "cargo-make-src" {} ''
  
negative.code: 
  rustPlatform.buildRustPackage rec {
    pname = "cargo-make";
    version = "0.19.2";
  
    src =
      let
  