A while ago I created the generate_constraints.sh mentioned here: https://www.pantsbuild.org/docs/python-third-party-dependencies I re-ran it this morning and it seems to have caused some issues. Now if I try to run anything I get the following error: Exception message: 1 Exception encountered: Exception: While expanding link "build-support/bin/python": Failed to read link ".../build-support/bin/python3": Absolute symlink: ".../build-support/bin/python3"

You probably just need to add some ignores to your pants config. For example, Pants itself uses this lockfile recipe and has this ignore (and others) configured here: https://github.com/pantsbuild/pants/blob/e3b3e53b8f31b098ad2334f6537d442f9d453045/pants.toml#L37-L48

That was it. I just added an ignore for the entire build-support folder. Thanks!