anchor.diff:  
     librouteros = callPackage ../development/python-modules/librouteros { };
   
  -  libsass = (callPackage ../development/python-modules/libsass {
  +  libsass = callPackage ../development/python-modules/libsass {
       inherit (pkgs) libsass;
  -  });
  +  };
   
     libsavitar = callPackage ../development/python-modules/libsavitar { };
   
  
positive.code:   openapi-spec-validator = callPackage ../development/python-modules/openapi-spec-validator { };
  
    openbabel-bindings = callPackage ../development/python-modules/openbabel-bindings {
        openbabel = (callPackage ../development/libraries/openbabel { python = self.python; });
    };
  
    opencv3 = toPythonModule (pkgs.opencv3.override {
  
negative.code: 
    gst-python = callPackage ../development/python-modules/gst-python {
      inherit (pkgs) meson;
      inherit (pkgs.gst_all_1) gst-plugins-base;
    };
  
    gtfs-realtime-bindings = callPackage ../development/python-modules/gtfs-realtime-bindings { };
  