anchor.diff:      };
   
       "regex" = python.mkDerivation {
  -      name = "regex-2018.7.11";
  -      src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/9f/79/adbe79373ec3c56ae61670bbed30609fe4a9b6af835478fa12bf8795cdec/regex-2018.07.11.tar.gz"; sha256 = "9308dbce8e5ff4ee06b172a777f6c7f650a5835a5ad41a6080eb501639c27a2f"; };
  +      name = "regex-2018.8.29";
  +      src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/2a/0a/944977367c8a6cfcfa6fcb8ac6b1f0f9a667c1f34194091c766b5d7c44d7/regex-2018.08.29.tar.gz"; sha256 = "b73cea07117dca888b0c3671770b501bef19aac9c45c8ffdb5bea2cca2377b0a"; };
         doCheck = commonDoCheck;
         checkPhase = "";
         installCheckPhase = "";
  
positive.code:       self."zope.interface"
      ];
        meta = with pkgs.stdenv.lib; {
          homepage = "http://www.attrs.org/";
          license = licenses.mit;
          description = "Classes Without Boilerplate";
        };
  
negative.code:       self."zope.deprecation"
      ];
        meta = with pkgs.stdenv.lib; {
          homepage = "https://docs.pylonsproject.org/projects/deform/en/latest/";
          license = "BSD-derived (http://www.repoze.org/LICENSE.txt)";
          description = "Form library with advanced features like nested forms";
        };
  