Traceback (most recent call last):
  File "/home/uke/oil/bin/oils_for_unix.py", line 27, in <module>
    from core import shell
  File "/home/uke/oil/core/shell.py", line 40, in <module>
    from builtin import dirs_osh
  File "/home/uke/oil/builtin/dirs_osh.py", line 15, in <module>
    from pylib import path_lib
ImportError: cannot import name path_lib
devtools/byo.sh: fatal: bin/ysh +o no_exported +o no_osh_builtins stdlib/ysh/def-test.ysh  doesn't implement BYO: expected status 66, got 1