Jonathan Ringer d0aeb6581c Revert "python3Packages.greenlet: 0.4.16 -> 0.4.17" ...

This reverts commit 4bfbcbeb38.

0.4.17 can cause segfaults, and some packages such as `dulwich`
will fail during tests

2020-11-19 16:53:10 -08:00

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default.nix

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