uv not installing build dependencies

[EdvardsZ]

• A minimal code snippet that reproduces the bug :
  uv pip install git+https://github.com/nerfstudio-project/gsplat

  File "<string>", line 152, in <module>
  File "<string>", line 33, in get_extensions
ModuleNotFoundError: No module named 'torch'
---
  Caused by: This error likely indicates that git+https://github.com/nerfstudio-project/gsplat depends on torch, but doesn't declare it as a build dependency. If git+https://github.com/nerfstudio-project/gsplat is a first-party package, consider adding torch to its `build-system.requires`. Otherwise, `uv pip install torch` into the environment and re-run with `--no-build-isolation`.

• However when using pip with pip install git+https://github.com/nerfstudio-project/gsplat
  Everything installs correctly!

Ofcourse when I install torch and use --no-build-isolation then uv installs it as well.

I think that uv fails to install build dependencies from setup.py (install-requires).

I am python build tool newbie, it could be that I am somehow mistaken

[konstin]

This is another case of #2252. The difference between pip and uv is intentional, closing this since --no-build-isolation solves this for your case.