running

./pants --binaries-baseurls="+['<https://binaries.example.com>']" options

fails on master (although specifying it in the environment or in

pants.ini

both work). I was trying to bisect this by running through all previous commits that touch

src/python/pants/option/parser.py

, but none of the previous several commits that modify that file succeed in building the rust native engine when I run

./pants -V

after checkout, each failing with compilation errors in third party packages. is rust not expected to build on older checkouts? how do i get to a state that allows me to invoke pants on older checkouts, at least enough to run

./pants --binaries-baseurls="+['<https://binaries.example.com>']" options

again?