anchor.diff:        substituteInPlace test-requirements.txt --replace 'nose==1.3' 'nose'
       '';
   
  +    doCheck = !isPy3k;  # lots of transient failures
       checkPhase = ''
         # Not worth the trouble
         rm test/with_dummyserver/test_proxy_poolmanager.py
  
positive.code:   suds-jurko = buildPythonPackage rec {
      name = "suds-jurko-${version}";
      version = "0.6";
  
      src = pkgs.fetchurl {
        url = "https://pypi.python.org/packages/source/s/suds-jurko/${name}.zip";
  
negative.code: 
    sqlalchemy9 = buildPythonPackage rec {
      name = "SQLAlchemy-0.9.9";
      doCheck = !isPyPy;  # lots of tests fail
  
      src = pkgs.fetchurl {
        url = "https://pypi.python.org/packages/source/S/SQLAlchemy/${name}.tar.gz";
  