I'm also wondering how to use pip installed type hints. For example, I can add

grpc-stubs

to my requirements but they're not automatically used. I tried adding

//:grpc-stubs

to the

dependencies

for the targets using grpc but that didn't do the trick either.

Hm, I'm surprised that didn't do the trick. We're working on adding a

stubs_mapping

mechanism to teach dependency inference about type stubs - but in the meantime, the workaround is to manually add deps on the stubs like you're doing One way you could debug is to do

--no-process-execution-local-cleanup

to inspect the chroot where MyPy is running. Then use

unzip

the MyPy runner PEX there and check if it has the type stubs

Thanks!