anchor.diff:        inherit diskImage;
       });
   
  -  # TODO: move missing distros upstream
  +  # TODO: remove when accepted upstream: https://github.com/NixOS/nixpkgs/pull/22009
     customDebDistros = with pkgs; with vmTools; with debDistros; debDistros // {
       ubuntu1610i386 = {
         name = "ubuntu-16.10-yakkety-i386";
  
positive.code:       ];
        urlPrefix = mirror://ubuntu;
        packages = commonDebPackages ++ [ "diffutils" "libc-bin" ];
      };
    };
  
  
negative.code:       packagesLists = [
  	(fetchurl {
  	   url = mirror://ubuntu/dists/yakkety/main/binary-i386/Packages.xz;
             sha256 = "13r75sp4slqy8w32y5dnr7pp7p3cfvavyr1g7gwnlkyrq4zx4ahy";
          })
          (fetchurl {
            url = mirror://ubuntu/dists/yakkety/universe/binary-i386/Packages.xz;
            sha256 = "14fid1rqm3sc0wlygcvn0yx5aljf51c2jpd4x0zxij4019316hsh";
          })
        ];
        urlPrefix = mirror://ubuntu;
  