self: super: {
  anycast_healthchecker = self.python3.pkgs.callPackage ./anycast_healthchecker {};
  pyexcel-webio = self.python3.pkgs.callPackage ./pyexcel-webio {};
  wetter = self.python3.pkgs.callPackage ./wetter {
    inherit (self) python2 pkgconfig libsass;
  };
}