Error "unexpected io operation while removing clobbered file - Is a directory (os error 21)" error when regenerating pixi.lock with existing .pixi directory

[traversaro]

Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

On Linux (Ubuntu 24.04 WSL2, but I replicated it in CI in https://github.com/robotology/icub-models-generator/actions/runs/12100642126) with pixi 0.38.0:

git clone https://github.com/robotology/icub-models-generator
cd icub-models-generator
git checkout 87d1222322b9e0d80836d362ded8c20d9775145f
pixi install
rm -rf pixi.lock
pixi install

The second pixi install fails with:

traversaro@IITBMP014LW012:~/icub-models-generator$ pixi install
  ✔ validate cache       189 packages in 10s 247ms
  ⠦ download & extract   [00:00:10] [━━━━━━━━━━━━━━━─────] 116.32 MiB @ 10.30 MiB/s qt-main (+1)
  ⠦ installing packages  [00:00:10] [━━━━━━━━━━━━━━━━━━━━]   366/369 sysroot_linux-64
  × failed to link sysroot_linux-64-2.17-h4a8ded7_18.conda
  ├─▶ failed to link 'x86_64-conda-linux-gnu/sysroot/usr/share/zoneinfo'
  ├─▶ unexpected io operation while removing clobbered file
  ╰─▶ Is a directory (os error 21)

The workaround is simple (delete the .pixi folder) but it may not be obvious for non-expert users of pixi.

Additional Context

Downstream issue: robotology/icub-models-generator#278 .

[traversaro]

Duplicate of #751 . I thought I was opening it in pixi, not sure why I opened it here.