Buildouts are broken on python 3.6, because of a Python bug

$ conda create -n test -c conda-forge python=3.6
$ source activate test
$ mkdir test && cd test
$ wget https://bootstrap.pypa.io/bootstrap-buildout.py
$ cat buildout.cfg
[buildout]
parts = scripts
eggs = nose
extensions = bob.buildout

debug = true
verbose = true
newest = false

[scripts]
recipe = bob.buildout:scripts
$ python3.6 bootstrap-buildout.py
$ bin/buildout
$ bin/nosetests
Traceback (most recent call last):
  File "bin/nosetests", line 12, in <module>
    site.main() #this is required for python>=3.4
  File "/home/amir/miniconda/envs/test/lib/python3.6/site.py", line 525, in main
    abs_paths()
  File "/home/amir/miniconda/envs/test/lib/python3.6/site.py", line 110, in abs_paths
    m.__cached__ = os.path.abspath(m.__cached__)
  File "/home/amir/miniconda/envs/test/lib/python3.6/posixpath.py", line 369, in abspath
    path = os.fspath(path)
TypeError: expected str, bytes or os.PathLike object, not NoneType