anchor.diff:        };
       };
   
  +    "Markdown" = python.mkDerivation {
  +      name = "Markdown-2.6.11";
  +      src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/b3/73/fc5c850f44af5889192dff783b7b0d8f3fe8d30b65c8e3f78f8f0265fecf/Markdown-2.6.11.tar.gz"; sha256 = "a856869c7ff079ad84a3e19cd87a64998350c2b94e9e08e44270faef33400f81"; };
  +      doCheck = commonDoCheck;
  +      checkPhase = "";
  +      installCheckPhase = "";
  +      buildInputs = commonBuildInputs;
  +      propagatedBuildInputs = [ ];
  +      meta = with pkgs.stdenv.lib; {
  +        homepage = "https://Python-Markdown.github.io/";
  +        license = licenses.bsdOriginal;
  +        description = "Python implementation of Markdown.";
  +      };
  +    };
  +
       "MarkupSafe" = python.mkDerivation {
         name = "MarkupSafe-1.0";
         src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/4d/de/32d741db316d8fdb7680822dd37001ef7a448255de9699ab4bfcbdf4172b/MarkupSafe-1.0.tar.gz"; sha256 = "a6be69091dac236ea9c6bc7d012beab42010fa914c459791d627dad4910eb665"; };
  
positive.code:     };
  
      "attrs" = python.mkDerivation {
        name = "attrs-18.1.0";
        src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/e4/ac/a04671e118b57bee87dabca1e0f2d3bda816b7a551036012d0ca24190e71/attrs-18.1.0.tar.gz"; sha256 = "e0d0eb91441a3b53dab4d9b743eafc1ac44476296a2053b6ca3af0b139faf87b"; };
        doCheck = commonDoCheck;
        checkPhase = "";
        installCheckPhase = "";
  
negative.code:       };
      };
  
      "py-gfm" = python.mkDerivation {
        name = "py-gfm-0.1.3";
        src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/12/e4/6b3d8678da04f97d7490d8264d8de51c2dc9fb91209ccee9c515c95e14c5/py-gfm-0.1.3.tar.gz"; sha256 = "f107e43248eba6236b19ceda78531f40c7bdb85ba4a219f478c92920397f4f98"; };
        doCheck = commonDoCheck;
        checkPhase = "";
        installCheckPhase = "";
        buildInputs = commonBuildInputs;
        propagatedBuildInputs = [
        self."Markdown"
      ];
        meta = with pkgs.stdenv.lib; {
          homepage = "https://github.com/zopieux/py-gfm";
          license = licenses.bsdOriginal;
          description = "An implementation of Github-Flavored Markdown written as an extension to the Python Markdown library.";
        };
      };
  
      "pyjade" = python.mkDerivation {
        name = "pyjade-4.0.0";
        src = pkgs.fetchurl { url = "https://files.pythonhosted.org/packages/4a/04/396ec24e806fd3af7ea5d0f3cb6c7bbd4d00f7064712e4dd48f24c02ca95/pyjade-4.0.0.tar.gz"; sha256 = "8d95b741de09c4942259fc3d1ad7b4f48166e69cef6f11c172e4b2c458b1ccd7"; };
  