Seems like schema packaging is broken

Job #170581 failed for 66df81c5:

import: 'bob.bio.vein'
+ compare_rois.py --help
Traceback (most recent call last):
  File "/scratch/builds/bob/bob.nightlies/miniconda/conda-bld/bob.bio.vein_1565710015865/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/bin/compare_rois.py", line 11, in <module>
    sys.exit(main())
  File "/scratch/builds/bob/bob.nightlies/miniconda/conda-bld/bob.bio.vein_1565710015865/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/lib/python3.6/site-packages/bob/bio/vein/script/compare_rois.py", line 150, in main
    version=pkg_resources.require('bob.bio.vein')[0].version
  File "/scratch/builds/bob/bob.nightlies/miniconda/conda-bld/bob.bio.vein_1565710015865/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/lib/python3.6/site-packages/pkg_resources/__init__.py", line 900, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/scratch/builds/bob/bob.nightlies/miniconda/conda-bld/bob.bio.vein_1565710015865/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/lib/python3.6/site-packages/pkg_resources/__init__.py", line 786, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'contextlib2==0.5.5' distribution was not found and is required by schema