anchor.diff:  
       ## see http://wiki.winehq.org/Gecko
       gecko32 = fetchurl rec {
  -      version = "2.47.2";
  +      version = "2.47.3";
         url = "https://dl.winehq.org/wine/wine-gecko/${version}/wine-gecko-${version}-x86.msi";
  -      sha256 = "07d6nrk2g0614kvwdjym1wq21d2bwy3pscwikk80qhnd6rrww875";
  +      sha256 = "sha256-5bmwbTzjVWRqjS5y4ETjfh4MjRhGTrGYWtzRh6f0jgE=";
       };
       gecko64 = fetchurl rec {
  -      version = "2.47.2";
  +      version = "2.47.3";
         url = "https://dl.winehq.org/wine/wine-gecko/${version}/wine-gecko-${version}-x86_64.msi";
  -      sha256 = "0iffhvdawc499nbn4k99k33cr7g8sdfcvq8k3z1g6gw24h87d5h5";
  +      sha256 = "sha256-pT7pVDkrbR/j1oVF9uTiqXr7yNyLA6i0QzSVRc4TlnU=";
       };
   
       ## see http://wiki.winehq.org/Mono
  
positive.code: 
    unstable = fetchurl rec {
      # NOTE: Don't forget to change the SHA256 for staging as well.
      version = "7.12";
      url = "https://dl.winehq.org/wine/source/7.x/wine-${version}.tar.xz";
      sha256 = "sha256-gJzsE3FmNubq/Uw9pzEkVqhE0xYCClV4YRvNuiEGnGg=";
      inherit (stable) gecko32 gecko64 patches;
  
      mono = fetchurl rec {
  
negative.code:   staging = fetchFromGitHub rec {
      # https://github.com/wine-staging/wine-staging/releases
      inherit (unstable) version;
      sha256 = "sha256-U1awbhJRT3aAJstyEjv2Dp20FqyQ4ntnFFRYJb12C/U=";
      owner = "wine-staging";
      repo = "wine-staging";
      rev = "v${version}";
  