When running build :tgz, seeing rules_pkg error

[chrisirhc]

The tgz targets from pkg_tar are failing. When testing locally, it seems that I have a configuration that requires rules_pkg 0.10 likely due to the fix bazelbuild/rules_pkg#630 :

Error log looks like:

…es/_main/../rules_pkg~/pkg/private/tar/build_tar.py", line 21, in <module>
    from pkg.private import archive
ModuleNotFoundError: No module named 'pkg'

Upgrading to rules_pkg 0.10 is blocked due to #10 .

Creating this issue for awareness.