[noisenotsignal]

There’s also relocating across machines. For example, maybe your build environment has access to internal registries but your release environment does not. I naively thought you could build your venv and just copy to the new machine (both environments were Ubuntu) but ran into errors (due to links breaking). We also used pex for a bit, which is kind of like building a binary of a venv, and that eventually stopped working too when the C ABI was no longer the same between environments. There didn’t seem to be an easy way to pick the ABI version to target when creating the pex file, so I gave up and just downloaded the wheels for internal packages in the build.