For the record, the solution that worked for me was: 1. Remove the artifacts produced by

pants tailor ::

2. Re-reading all of the docs under “Getting Started”, “Python”, “Writing Plugins” and a bit more. 3. Implement my own script to produce a global

requirements.txt

for Pants. 4. Implement my own script to produce

BUILD

files for Pants. I now have a much better understanding (and progress). My takeaway here for me is that the docs are helpful (in contrast to the usual stuff), so if you have a special use-case (like that fact that we have our own custom build-system that is not well supported by

tailor

), you should probably just trudge through it.