uv add treats valid pyproject.toml as invalid

[metaist]

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04.4 LTS
Release:        22.04
Codename:       jammy

$ uv -vv add --optional foo pyright
    0.006241s DEBUG uv uv 0.4.0
    0.006540s DEBUG uv_workspace::workspace Found project root: `/home/metaist/github.com/ds`
    0.007855s DEBUG uv_workspace::workspace No workspace root found, using project root
    0.008276s DEBUG uv::commands::project The virtual environment's Python version satisfies `Python >=3.8`
 uv_requirements::specification::from_source source=pyright
 uv_client::linehaul::linehaul 
    0.009417s DEBUG uv_client::base_client Using request timeout of 30s
 uv_resolver::flat_index::from_entries 
error: Dependencies in `pyproject.toml` are malformed

Here's the pyproject.toml.

Interestingly, if I run uv add pyright or uv add --dev pyright it works just fine.

[charliermarsh]

Thanks! Will take a look.