anchor.diff:  
   rustPlatform.buildRustPackage rec {
     pname = "cargo-make";
  -  version = "0.19.4";
  +  version = "0.19.5";
   
     src =
       let
  
positive.code:         owner = "sagiegurari";
          repo = pname;
          rev = version;
          sha256 = "019dn401p4bds144fbvqxbnn8vswcj0lxr8cvgpxb2y22640z60l";
        };
        cargo-lock = fetchurl {
          url = "https://gist.githubusercontent.com/xrelkd/e4c9c7738b21f284d97cb7b1d181317d/raw/c5b9fde279a9f6d55d97e0ba4e0b4cd62e0ab2bf/cargo-make-Cargo.lock";
          sha256 = "1d5md3m8hxwf3pwvx059fsk1b3vvqm17pxbbyiisn9v4psrsmld5";
        };
      in
      runCommand "cargo-make-src" {} ''
  
negative.code: 
    buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
  
    cargoSha256 = "1rmdmvr5wc2m0yv3dy07cv9y1xrwlfri3hk97zjwv5f73wgncspy";
  
    # Some tests fail because they need network access.
    # However, Travis ensures a proper build.
  