Xonsh no longer start

[SamLukeYes]

Describe the bug

After a recent nixos-unstable update, xonsh is no longer able to launch.

Traceback (most recent call last):
  File "/nix/store/ghr6zvrvjcww884wrcj0pimmpjs2kx61-xonsh-0.15.1/bin/xonsh", line 5, in <module>
    from xonsh.main import main
ModuleNotFoundError: No module named 'xonsh'

Steps To Reproduce

Launch xonsh

Expected behavior

Xonsh should start without issue

Screenshots

If applicable, add screenshots to help explain your problem.

Additional context

I've found a change of python env that reached nixos-unstable recently (#297628). Perhaps it is the change that breaks xonsh.

Notify maintainers

@AndersonTorres

Metadata

• system: "x86_64-linux"
• host os: Linux 6.6.22-xanmod1, NixOS, 24.05 (Uakari), 24.05pre-git
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.18.2
• nixpkgs: /etc/nix/inputs/nixpkgs

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[FlyingWombat]

May not be the same issue, but this doesn't work either:

❯ nix-shell -p 'python3.withPackages (p: with p; [ xonsh ])'
❯ python
Python 3.11.8 (main, Feb  6 2024, 21:21:21) [GCC 13.2.0] on linux
>>> import xonsh
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'xonsh'

[3541]

python3.withPackages (p: with p; [ xonsh ])'

Not sure this ever worked—xonsh in this expression is coming from Nixpkgs directly, not p. It still does not work after #302385.

[SamLukeYes]

python3.withPackages (p: with p; [ xonsh ])'

Not sure this ever worked—xonsh in this expression is coming from Nixpkgs directly, not p. It still does not work after #302385.

That's a different issue. You should probably use xonsh.override { extraPackages = ps: with p; [ ... ]; } instead. However, if you really need the full python env, unfortunately there's no way to use it outside the xonsh derivation for now. Maybe we should add it to passthru.