Issues with stale cache / incorrect "depends on"

[knipknap]

Whenever I change a version in my Python project I get issues with stale versions being cached somewhere. Stuff like this:

(.venv) $ pixi install 
Error:   × failed to solve the pypi requirements of 'default' 'linux-64'
  ├─▶ failed to resolve pypi dependencies
  ╰─▶ Because rayforge==0.24.post3+git.b6c16603.dirty depends on pycairo==1.27.0 and pycairo==1.28.0, we can conclude that rayforge==0.24.post3+git.b6c16603.dirty cannot be used.
      And because only rayforge==0.24.post3+git.b6c16603.dirty is available and you require rayforge, we can conclude that your requirements are unsatisfiable.

Except that Version "1.27.0" is not defined anywhere in my entire project:

(.venv) $ grep -R "1.27.0" requirements.txt pyproject.toml pixi.toml 
(.venv) $ 

Any idea what I am doing wrong? When I temporarily comment out my package reference:

[pypi-dependencies]
#rayforge = { editable = true, path = "." }

then "pixi install" passes. I made sure that all requirements from requirement.txt are synced up with the versions specified in Pixi. (I have to maintain both in parallel because the package is shipped as a wheel.)

How can this be resolved?