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`Failed to resolve requirements from PEX environme...
# development
b
Failed to resolve requirements from PEX environment
after updating pytest's lockfile 🧵
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pex.environment.ResolveError: Failed to resolve requirements from PEX environment @ /home/joshuacannon/.cache/pants/named_caches/pex_root/unzipped_pexes/5918a34c14177ea9a979e86f8a556bfecdb91156.
Needed manylinux_2_31_x86_64-cp-38-cp38 compatible dependencies for:
 1: typing-extensions>=3.10
    Required by:
      FingerprintedDistribution(distribution=mypy 0.931 (/home/joshuacannon/.cache/pants/named_caches/pex_root/installed_wheels/dba94d8815514f1ecbd1eea18a996153625656b7/mypy-0.931-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl), fingerprint='400fe5643e0a58ecedf0f0d82e59390857502bad')
    But this pex had no 'typing-extensions' distributions.
the lockfile has 
typing-extensions==4.0.1;
All that changed in 
toml
is adding
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"pytest-mypy-testing",
  "mypy",
h
this is in your own repo or pantsbuild/pants? @polite-garden-50641 has experienced similar things, I haven't been able to figure it out yet
b
pantsbuild repo
Explicitly setting 
typing-extensions
seemed to work
Bummer it produced a lockfile thats seemingly unsatisfiable
h
Ah that's an interesting angle if Poetry is producing a bad lockfile. Sounds like the lockfile did change when you added typing-extensions, right?
b
Yes
h
Okay interesting. Do note that Poetry's resolver != Pex's (pip's) resolver. It's inherently not sound that we use Poetry to generate lockfiles for pip.... But, we needed to be pragmatic with 2.7's tool lockfiles that Pants needed to automatically generate lockfiles; Poetry > pip-compile, and Pex didn't have the ability to generate. So we went with Poetry, despite the flaws, while John has been doing amazing work to teach pex to generate lockfiles
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