anchor.diff:    gdk-pixbuf = pkgs.gdk-pixbuf_2-36;
     gnome-desktop = pkgs.gnome-desktop_3-22;
     gsettings-desktop-schemas = pkgs.gsettings-desktop-schemas_3-24;
  +  gvfs = pkgs.gvfs_1-32;
     tracker = pkgs.tracker_1-12;
   };
   nautilus = callPackageAlias "nautilus_3-22" { };
  
positive.code: 
  gupnp-igd = callPackage ../all-pkgs/g/gupnp-igd { };
  
  gvfs_1-30 = callPackage ../all-pkgs/g/gvfs {
    channel = "1.30";
    libsoup = pkgs.libsoup_2-58;
  };
  gvfs = callPackageAlias "gvfs_1-30" { };
  
  gx = pkgs.goPackages.gx.bin // { outputs = [ "bin" ]; };
  
  
negative.code:   atk = pkgs.atk_2-24;
    gdk-pixbuf = pkgs.gdk-pixbuf_2-36;
    gsettings-desktop-schemas = pkgs.gsettings-desktop-schemas_3-24;
    gvfs = pkgs.gvfs_1-32;
    nautilus = pkgs.nautilus_3-22;
  };
  evince = callPackageAlias "evince_3-22" { };
  