Virtual project fails to sync if no-build is set.

[LordAro]

Summary

I've been playing around with a "virtual" project, i.e. one without a build system.

I've found that the following results in an error:

$ uv init --vcs none
Initialized project `python`
$ uv sync
Using CPython 3.12.9
Creating virtual environment at: .venv
Resolved 1 package in 5ms
Audited in 0.02ms
$ uv sync --no-build
Resolved 1 package in 1ms
error: Distribution `python==0.1.0 @ virtual+.` can't be installed because it is marked as `--no-build` but has no binary distribution

Seems like a "virtual" project shouldn't be trying to be installed or built regardless of whether --no-build is set?

Perhaps related to #6749 ?

Platform

Ubuntu 22.04

Version

uv 0.6.7

Python version

Python 3.12.9

[LordAro]

A workaround seems to be to use no-binary-package = ["foobar"] where "foobar" is the virtual project

[charliermarsh]

We should probably allow that, yeah. Thanks.