anchor.diff:      JavaScriptCore
     ] else [
       glib
  -    spidermonkey_60
  +    spidermonkey_68
       dbus
       networkmanager
     ]);
  
positive.code: , pkg-config
  , cmake
  , zlib
  , fetchpatch
  , dbus
  , networkmanager
  , spidermonkey_60
  , pcre
  , gsettings-desktop-schemas
  , glib
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "libproxy";
    version = "0.4.17";
  
    src = fetchFromGitHub {
      owner = "libproxy";
      repo = "libproxy";
      rev = version;
      sha256 = "0v8q4ln0pd5231kidpi8wpwh0chcjwcmawcki53czlpdrc09z96r";
    };
  
    outputs = [ "out" "dev" "py3" ];
  