hey team I am seeing Pants giving me errors when I use versi

Question

hey team I am seeing Pants giving me errors when I use version `2 7 0` or `2 7 1` instead of `2 6 1` It may be related to <https pantsbuild slack com archives C046T6T9U p1634120386065100 thread ts=1634114532 062500 amp cid=C046T6T9U>

fresh-cat-90827 · Answer

This is the error I get when running ` pants package my project ` both on a MacOS and Linux device ```UndefinedEnvironmentName platform machine does not exist in evaluation environment pid 30314 gt Users username cache pants named caches pex root venvs 1d2a3f1b3961efbfba4c4373717c72d09d116d95 6a77fa4c4cb26ace625186dd39a1df03b7dc2d73 pex disable pip version check no python version warning exists action a use feature 2020 resolver isolated q cache dir Users username cache pants named caches pex root log private var folders k0 3nssm8v15r5b08k1k1wyhs2r0000gp T process executionr3ZLCK tmp tmpPQBi1j pip log download dest private var folders k0 3nssm8v15r5b08k1k1wyhs2r0000gp T process executionr3ZLCK tmp tmpcD5DZQ linux x86 64 cp 38 cp38 platform manylinux2014 x86 64 platform linux x86 64 implementation cp python version 38 abi cp38 only binary all constraint constraints txt dataclasses==0 6 pandas gt =1 0 requests gt =2 22 index url extra index url retries 5 timeout 15 exited with 2 and STDERR None``` I have experimented removing some of the requirements but the error keeps manifesting with other packages this seems to be arbitrary I wasn t able to tie it to a particular PyPI package and SQLAlchemy has been removed as well What information would one want to see to understand the problem better

fresh-cat-90827 · Answer

Not sure if I ve seen `python2 7` in outputs of PEX before it s not Pants 2 7 right ```stderr ERROR Exception Traceback most recent call last File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip internal cli base command py line 223 in main status = self run options args File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip internal cli req command py line 180 in wrapper return func self options args File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip internal commands download py line 131 in run reqs check supported wheels=True File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip internal resolution resolvelib resolver py line 122 in resolve requirements max rounds=try to avoid resolution too deep File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor resolvelib resolvers py line 453 in resolve state = resolution resolve requirements max rounds=max rounds File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor resolvelib resolvers py line 347 in resolve failure causes = self attempt to pin criterion name criterion File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor resolvelib resolvers py line 207 in attempt to pin criterion criteria = self get criteria to update candidate File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor resolvelib resolvers py line 198 in get criteria to update for r in self p get dependencies candidate File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip internal resolution resolvelib provider py line 172 in get dependencies for r in candidate iter dependencies with requires File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip internal resolution resolvelib candidates py line 247 in iter dependencies requires = self dist requires if with requires else File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor pkg resources init py line 2736 in requires dm = self dep map File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor pkg resources init py line 3023 in dep map self dep map = self compute dependencies File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor pkg resources init py line 3040 in compute dependencies common = frozenset reqs for extra None File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor pkg resources init py line 3037 in reqs for extra if not req marker or req marker evaluate extra extra File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor packaging markers py line 328 in evaluate return evaluate markers self markers current environment File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor packaging markers py line 244 in evaluate markers lhs value = get env environment lhs value File Users username cache pants named caches pex root venvs short a09ac147 lib python2 7 site packages pip vendor packaging markers py line 225 in get env 0 r does not exist in evaluation environment format name UndefinedEnvironmentName platform machine does not exist in evaluation environment ```

enough-analyst-54434 · Answer

As it turns out I m backporting modern Pex to the 2 7 x and 2 8 x branches to fix so you ll get the `platform machine` fix that went into Pex 2 1 52 here soon in 2 7 2rc0 and 2 8 0rc2

fresh-cat-90827 · Answer

this is amazing thank you so much < enough analyst 54434> Please let me know if you need to test anything Many thanks

enough-analyst-54434 · Answer

< fresh cat 90827> you should be good to go with one of these releases If you can test and report back that would be great

fresh-cat-90827 · Answer

amazing thank you < enough analyst 54434>

fresh-cat-90827 · Answer

I don t any longer get the `platform machine` error in `2 8 0rc5` Thanks a ton for fixing this < enough analyst 54434>