anchor.diff:  
   rustPlatform.buildRustPackage rec {
     pname = "rustup";
  -  version = "1.18.2";
  +  version = "1.18.3";
   
     src = fetchFromGitHub {
       owner = "rust-lang";
       repo = "rustup.rs";
       rev = version;
  -    sha256 = "0lyn06vzp5406sjng7msifigkal2lafppqjbdnigx8yvgxqgd06f";
  +    sha256 = "062l893i9czm1lm0x3arj3vfnjg3fg8q8xvq3y4adakmk6yrcc4x";
     };
   
  -  cargoSha256 = "0yxjy1kls80fcpwskklmihkqva16s6mawa8rdxc3zz8g588am03c";
  +  cargoSha256 = "1zwlr0zxc97m6xr28ryq5hkrvcns6qg68h7w09sga23xinm3fr11";
   
     nativeBuildInputs = [ pkgconfig ];
   
  
positive.code:     homepage = https://www.rustup.rs/;
      license = with licenses; [ asl20 /* or */ mit ];
      maintainers = [ maintainers.mic92 ];
    };
  }
  
negative.code:     '')
    ];
  
    doCheck = !stdenv.isAarch64 && !stdenv.isDarwin;
  
    postInstall = ''
      pushd $out/bin
  