pixi install / pixi add stuck at "updating lock-file"

[shirlilnice]

When trying to add Python 3.10.16 to a new Pixi environment, the solver gets stuck at the updating lock-file step and never finishes — even after uninstalling Pixi, clearing caches, and reinstalling.

Steps to Reproduce:

1. Uninstall Pixi and remove caches:

   rm -rf ~/.pixi ~/.cache/rattler

2. Reinstall Pixi (version 0.50.2).

3. Create a new workspace:

   pixi init test
   cd test

4. Add Python dependency:

   pixi add python=3.10.16 -vvv

   (Also tried pixi install -vvv without success.)

5. Observe that Pixi hangs at:

   updating lock-file [00:XX:XX] [0/1] 0/2
   

6. This happens even when only Python is in the dependencies.

Expected behavior:
Pixi should resolve the environment and update the lock file in a reasonable amount of time (seconds to minutes).

Actual behavior:
The process stays indefinitely on:

updating lock-file

No error message is shown, but the solve never completes.

Additional context:

• Pixi version: 0.50.2

• Platform: linux-64

• OS kernel: Linux 5.15.0-XX

• glibc: 2.35

• Workspace pixi.toml:

  [workspace]
  channels = ["conda-forge"]
  name = "test"
  platforms = ["linux-64"]
  version = "0.1.0"
  
  [tasks]
  
  [dependencies]
  python = "3.10.16.*"

• Logs show repeated keyring calls to conda.anaconda.org and *.conda.anaconda.org, and a very long delay in lock file update.

• Reproduced after:

  • Uninstalling Pixi
  • Removing caches (~/.pixi and ~/.cache/rattler)
  • Reinstalling Pixi

Screenshots / logs:
(attach the screenshots you provided showing pixi add and pixi install stuck)

[shirlilnice]

[lucascolley]

duplicate of #4299