Running PyVCF-0.6.8/setup.py -q bdist_egg --dist-dir /tmp/easy_install-g03wy5kq/PyVCF-0.6.8/egg-dist-tmp-dtk0mpp9
error: Setup script exited with error in PyVCF setup command: use_2to3 is invalid.
Current workaround: jamescasbon/PyVCF#331 (comment)
Or switching to the faster and maintained cyvcf2