anchor.diff:        homepage = http://bitbucket.org/zzzeek/alembic;
         description = "A database migration tool for SQLAlchemy";
         license = licenses.mit;
  +    };
  +  };
  +
  +  ansicolors = buildPythonPackage rec {
  +    name    = "ansicolors-${version}";
  +    version = "1.0.2";
  +
  +    src = self.fetchPypi {
  +      pname = "ansicolors";
  +      inherit version;
  +      sha256 = "02lmh2fbqcwr98cq13l9ql0fvyad1dcb3ap3c5xq9qwjp45m6r3n";
       };
     };
   
  
positive.code:     };
    };
  
    logilab_astng = buildPythonPackage rec {
      name = "logilab-astng-0.24.3";
  
  
negative.code:     };
    };
  
    pathspec = buildPythonPackage rec {
      pname   = "pathspec";
      version = "0.3.4";
      name    = "${pname}-${version}";
  
      src = self.fetchPypi {
        inherit pname version;
        sha256 = "0a37yrr2jhlg8aiynxivh2xqani7l9j725qxzrm7cm7m4rfcl1bn";
      };
    };
  
    pathtools = buildPythonPackage rec {
      name = "pathtools-${version}";
      version = "0.1.2";
  