anchor.diff:        else "system ${stdenv.system} not supported";
   
     sha256 = {
  -    "x86_64-linux"  = "10c77b643b73dd3ad7a45a89d8ab95b58b79dc10e0cf6e760fe24abc436b2fdb";
  -    "i686-linux"    = "9d2a70f34ab65d8d2cb013917f221835432aa63cd4ef781c9fd1404cfcfe7898";
  -    "x86_64-darwin" = "14d68f599a620cf421838ed037f0a1c4467e1b67475deeff62330a21fda4937b";
  +    "x86_64-linux"  = "0l1if9c4s4wkbi8k00pl7x00lil21izrd8wb9nv2b5q4gqidc1nh";
  +    "i686-linux"    = "1789wjwcpgw3mljl49c8v5kycisay684gyalkkvd06928423y9zb";
  +    "x86_64-darwin" = "1xrfq1a0xyifkhhjnpm6wsnms9w8c9q5rd2qqn4sm5npl7viy68p";
     }."${stdenv.system}" or (throw "system ${stdenv.system} not supported");
   
     arch = builtins.replaceStrings ["-linux"] [""] stdenv.system;
  
positive.code: , libxml2, libxslt, makeWrapper, p7zip, xar, gzip, cpio }:
  
  let
    version = "1.8.7";
    rake = buildRubyGem {
      inherit ruby;
      gemName = "rake";
  
negative.code: 
    preFixup = ''
      # 'hide' the template file from shebang-patching
      chmod -x "$out/opt/vagrant/embedded/gems/gems/vagrant-$version/plugins/provisioners/salt/bootstrap-salt.sh"
    '';
  
    postFixup = ''
      chmod +x "$out/opt/vagrant/embedded/gems/gems/vagrant-$version/plugins/provisioners/salt/bootstrap-salt.sh"
    '' +
    (stdenv.lib.optionalString stdenv.isDarwin ''
  