anchor.diff:  
   rustPlatform.buildRustPackage rec {
     pname = "cargo-make";
  -  version = "0.20.0";
  +  version = "0.21.0";
   
     src =
       let
  
positive.code: 
    meta = with stdenv.lib; {
      description = "A Rust task runner and build tool";
      homepage = https://github.com/sagiegurari/cargo-make;
      license = licenses.asl20;
      maintainers = with maintainers; [ xrelkd ];
      platforms = platforms.all;
  
negative.code: 
    buildInputs = stdenv.lib.optionals stdenv.isDarwin [ Security ];
  
    cargoSha256 = "1fsfjavad1cbq1xvck2j5vyppxck606cpmqrwbs4fjvdmlbgx3gp";
  
    # Some tests fail because they need network access.
    # However, Travis ensures a proper build.
  