anchor.diff:  
   
   
  +    "idna" = python.mkDerivation {
  +      name = "idna-2.6";
  +      src = pkgs.fetchurl { url = "https://pypi.python.org/packages/f4/bd/0467d62790828c23c47fc1dfa1b1f052b24efdf5290f071c7a91d0d82fd3/idna-2.6.tar.gz"; sha256 = "2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f"; };
  +      doCheck = commonDoCheck;
  +      buildInputs = commonBuildInputs;
  +      propagatedBuildInputs = [ ];
  +      meta = with pkgs.stdenv.lib; {
  +        homepage = "https://github.com/kjd/idna";
  +        license = licenses.bsdOriginal;
  +        description = "Internationalized Domain Names in Applications (IDNA)";
  +      };
  +    };
  +
  +
  +
       "importscan" = python.mkDerivation {
         name = "importscan-0.1";
         src = pkgs.fetchurl { url = "https://pypi.python.org/packages/2d/e1/01431f1afc930befc4a1e32b39e5227124ebcd5ee165683b0d8e80fdb45f/importscan-0.1.tar.gz"; sha256 = "5c003afe8d7f48d684bc9f66e8109952234812b225be324ce572ce4278b18f10"; };
  
positive.code:       doCheck = commonDoCheck;
        buildInputs = commonBuildInputs;
        propagatedBuildInputs = [
        self."PyYAML"
        self."WebOb"
        self."dectate"
        self."importscan"
  
negative.code: 
  
  
      "oauthlib" = python.mkDerivation {
        name = "oauthlib-2.0.6";
        src = pkgs.fetchurl { url = "https://pypi.python.org/packages/a5/8a/212e9b47fb54be109f3ff0684165bb38c51117f34e175c379fce5c7df754/oauthlib-2.0.6.tar.gz"; sha256 = "ce57b501e906ff4f614e71c36a3ab9eacbb96d35c24d1970d2539bbc3ec70ce1"; };
        doCheck = commonDoCheck;
        buildInputs = commonBuildInputs;
        propagatedBuildInputs = [ ];
        meta = with pkgs.stdenv.lib; {
          homepage = "https://github.com/idan/oauthlib";
          license = licenses.bsdOriginal;
          description = "A generic, spec-compliant, thorough implementation of the OAuth request-signing logic";
        };
      };
  
  
  
      "passlib" = python.mkDerivation {
        name = "passlib-1.7.1";
        src = pkgs.fetchurl { url = "https://pypi.python.org/packages/25/4b/6fbfc66aabb3017cd8c3bd97b37f769d7503ead2899bf76e570eb91270de/passlib-1.7.1.tar.gz"; sha256 = "3d948f64138c25633613f303bcc471126eae67c04d5e3f6b7b8ce6242f8653e0"; };
        doCheck = commonDoCheck;
        buildInputs = commonBuildInputs;
        propagatedBuildInputs = [ ];
        meta = with pkgs.stdenv.lib; {
          homepage = "https://bitbucket.org/ecollins/passlib";
          license = licenses.bsdOriginal;
          description = "comprehensive password hashing framework supporting over 30 schemes";
        };
      };
  
  