# Mach-nix, pip2nix, poetry2nix, or pynixify for Zulip provision
**URL:** https://discourse.nixos.org/t/mach-nix-pip2nix-poetry2nix-or-pynixify-for-zulip-provision/18836
**Category:** Development
**Created:** [April 25, 2022, 6:03am UTC](https://discourse.nixos.org/t/mach-nix-pip2nix-poetry2nix-or-pynixify-for-zulip-provision/18836 "2022-04-25T06:03:10Z")
**Posts on this page:** 2
**Page:** 2
### Author:  [@rht](https://discourse.nixos.org/u/rht)
#### Post date: [May 6, 2022, 11:32am UTC](https://discourse.nixos.org/t/mach-nix-pip2nix-poetry2nix-or-pynixify-for-zulip-provision/18836/21 "2022-05-06T11:32:59Z")
It seems that the `poetry2nix` Mypy problem is documented in [mypy patch is failing · Issue #561 · nix-community/poetry2nix · GitHub](https://github.com/nix-community/poetry2nix/issues/561), and it seems to have been fixed in Nixpkgs unstable. But I just updated my NixOS unstable, and got the same error message for both Mypy 0.940 and 0.942.
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### Author:  [@rht](https://discourse.nixos.org/u/rht)
#### Post date: [May 9, 2022, 11:36am UTC](https://discourse.nixos.org/t/mach-nix-pip2nix-poetry2nix-or-pynixify-for-zulip-provision/18836/22 "2022-05-09T11:36:07Z")
> [@rht](#):
>
> It seems that the `poetry2nix` Mypy problem is documented in [mypy patch is failing · Issue #561 · nix-community/poetry2nix · GitHub](https://github.com/nix-community/poetry2nix/issues/561), and it seems to have been fixed in Nixpkgs unstable. But I just updated my NixOS unstable, and got the same error message for both Mypy 0.940 and 0.942.
This is because I’m using wheels, which doesn’t require patching. Fixed in [https://github.com/nix-community/poetry2nix/commit/5612b5cbdf6b1c532165478761f840d7cbfda37f](https://github.com/nix-community/poetry2nix/commit/5612b5cbdf6b1c532165478761f840d7cbfda37f).
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