I was trying to switch over from rules_python_external. At first I made a naive change following the current README.md, which didn't work (code compiles but then modules are not imported in runtime). Then I read the instructions again, tried pip3_import, which doesn't exist (under pip.bzl). I then actually read pip.bzl, and tried to do what the comment says, which doesn't work (the code expects requirements.txt under an external directory, i.e. the comment is misleading). Lastly I followed the example and appended // to the requirement file, which felt odd and unnecessary (and realized this was what I was doing with rules_python_external.

Also the repo is not versioned often enough, many of the instruction seems to be for 0.1.0 while the code have moved past it. I ended up simply using HEAD / master.

For the record, the change that I ended up making: a54bf79 (#50)