anchor.diff:      meta = {
         homepage = "http://home.blarg.net/~steveha/pyfeed.html";
         description = "Tools for syndication feeds";
  +    };
  +  };
  +
  +  pyflakes = buildPythonPackage rec {
  +    name = "pyflakes-0.6.1";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/p/pyflakes/${name}.tar.gz";
  +      md5 = "00debd2280b962e915dfee552a675915";
  +    };
  +
  +    buildInputs = [ unittest2 ];
  +
  +    meta = {
  +      homepage = "https://launchpad.net/pyflakes";
  +      description = "A simple program which checks Python source files for errors.";
  +      license = pkgs.lib.licenses.mit;
  +      maintainers = [ stdenv.lib.maintainers.garbas ];
       };
     };
   
  
positive.code:       homepage = "http://matplotlib.sourceforge.net/";
        platforms = stdenv.lib.platforms.linux;
        maintainers = [ stdenv.lib.maintainers.simons ];
      };
    });
  
  
negative.code: 
    pep8 = buildPythonPackage rec {
      name = "pep8-${version}";
      version = "1.4.5";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/pep8/${name}.tar.gz";
        md5 = "055dbd22ac5669232fdba752612e9686";
      };
  
      #======================================================================
      #FAIL: test_check_simple (testsuite.test_shell.ShellTestCase)
      #----------------------------------------------------------------------
      #Traceback (most recent call last):
      #  File "/tmp/nix-build-python-pep8-1.4.5.drv-0/pep8-1.4.5/testsuite/test_shell.py", line 84, in test_check_simple
      #    self.assertTrue(config_filename.endswith('tox.ini'))
      #AssertionError: False is not true
      #
      #----------------------------------------------------------------------
      #Ran 21 tests in 0.711s
      #
      #FAILED (failures=1)
      doCheck = false;
  
      meta = {
        homepage = "http://pep8.readthedocs.org/";
        description = "Python style guide checker";
        license = pkgs.lib.licenses.mit;
        maintainers = [ stdenv.lib.maintainers.garbas ];
      };
    };
  
  