anchor.diff:  
     buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
   
  -  cargoSha256 = "1hmfg3x9p5a2vz2r3v8m5wgyabbybl5lcjvi930b9wi5cnfm756g";
  +  cargoSha256 = "00yvx87s8vngb97ldq2amdhdv3nn38liys7nilay73phx0xybx4p";
   
     # Some tests fail because they need network access.
     # However, Travis ensures a proper build.
  
positive.code:         owner = "sagiegurari";
          repo = pname;
          rev = version;
          sha256 = "175cflcm9k81fpp2pxz4hcaf8v3i7jqc9gcr4flnsqxjrh22vymp";
        };
        cargo-lock = fetchurl {
          url = "https://gist.githubusercontent.com/xrelkd/e4c9c7738b21f284d97cb7b1d181317d/raw/f1e6360acfbe5ae573f8f31a82a5c881a6f0ed68/cargo-make-Cargo.lock";
          sha256 = "004dx4gyby5smpvawqv946mambcg59zq6n8h89hz61mxkh7frmh4";
        };
      in
      runCommand "cargo-make-src" {} ''
  
negative.code: 
  rustPlatform.buildRustPackage rec {
    pname = "cargo-make";
    version = "0.19.3";
  
    src =
      let
  