anchor.diff:        self."regex"
       ];
         meta = with pkgs.stdenv.lib; {
  -        homepage = "https://github.com/AlejandroFrias/case-conversion";
  +        homepage = "";
           license = licenses.mit;
           description = "Convert between different types of cases (unicode supported)";
         };
       };
   
       "certifi" = python.mkDerivation {
  -      name = "certifi-2018.8.24";
  -      src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/e1/0f/f8d5e939184547b3bdc6128551b831a62832713aa98c2ccdf8c47ecc7f17/certifi-2018.8.24.tar.gz"; sha256 = "376690d6f16d32f9d1fe8932551d80b23e9d393a8578c5633a2ed39a64861638"; };
  -      doCheck = commonDoCheck;
  -      checkPhase = "";
  -      installCheckPhase = "";
  -      buildInputs = commonBuildInputs;
  -      propagatedBuildInputs = [ ];
  -      meta = with pkgs.stdenv.lib; {
  -        homepage = "http://certifi.io/";
  +      name = "certifi-2018.10.15";
  +      src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/41/b6/4f0cefba47656583217acd6cd797bc2db1fede0d53090fdc28ad2c8e0716/certifi-2018.10.15.tar.gz"; sha256 = "6d58c986d22b038c8c0df30d639f23a3e6d172a05c3583e766f4c0b785c0986a"; };
  +      doCheck = commonDoCheck;
  +      checkPhase = "";
  +      installCheckPhase = "";
  +      buildInputs = commonBuildInputs;
  +      propagatedBuildInputs = [ ];
  +      meta = with pkgs.stdenv.lib; {
  +        homepage = "";
           license = licenses.mpl20;
           description = "Python package for providing Mozilla's CA Bundle.";
         };
  
positive.code: # See more at: https://github.com/garbas/pypi2nix
  #
  # COMMAND:
  #   pypi2nix -I nixpkgs=/home/ts/git/nixpkgs -V 3.7 -r pypi2nix_source_deps -E postgresql -E libffi
  #
  
  { pkgs ? import <nixpkgs> {},
  
negative.code: 
    generated = self: {
      "Chameleon" = python.mkDerivation {
        name = "Chameleon-3.5";
        src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/d0/59/ad925b5d098117fd6f339e6f7f29f98400ea11c5377f531ac55625909a5e/Chameleon-3.5.tar.gz"; sha256 = "cb0f97211faf03b46bf30e517c0e589bdc4a6cf678a9d1d68312d710849303a9"; };
        doCheck = commonDoCheck;
        checkPhase = "";
        installCheckPhase = "";
        buildInputs = commonBuildInputs;
        propagatedBuildInputs = [ ];
        meta = with pkgs.stdenv.lib; {
          homepage = "";
          license = "BSD-like (http://repoze.org/license.html)";
          description = "Fast HTML/XML Template Compiler.";
        };
  