anchor.diff:  
     buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
   
  -  cargoSha256 = "0wf60ck0w3m9fa19dz99q84kw05sxlj2pp6bd8r1db3cfy8f8h8j";
  +  cargoSha256 = "1rmdmvr5wc2m0yv3dy07cv9y1xrwlfri3hk97zjwv5f73wgncspy";
   
     # Some tests fail because they need network access.
     # However, Travis ensures a proper build.
  
positive.code: 
  rustPlatform.buildRustPackage rec {
    pname = "cargo-make";
    version = "0.19.4";
  
    src =
      let
  
negative.code:         owner = "sagiegurari";
          repo = pname;
          rev = version;
          sha256 = "0xjyzsi3n3lb5g4gl6v0s4p87nazkqgjf244m792iji9i568ynjb";
        };
        cargo-lock = fetchurl {
          url = "https://gist.githubusercontent.com/xrelkd/e4c9c7738b21f284d97cb7b1d181317d/raw/285cf8f9b0ab33db0d656fdc8e759feed55c0167/cargo-make-Cargo.lock";
          sha256 = "0l2i2hq43k482m2w6hpapaq53r8bjljfcszp6csljj4fvxcl62yj";
        };
      in
      runCommand "cargo-make-src" {} ''
  