Maturin fails to use workspace license file

[anuradhawick]

Bug Description

I have a workspace with multiple rust crates. The following fails

[package]
name = "pip"
version.workspace = true
edition.workspace = true
authors.workspace = true
description.workspace = true
readme.workspace = true
license-file.workspace = true

with error

💥 maturin failed
  Caused by: license file `/home/anuvini/Desktop/kmertools/LICENSE` exists outside of the project root `/home/anuvini/Desktop/kmertools/pip`
  Caused by: prefix not found

If I remove license-file.workspace = true and add a symlink to license in root folder, it succeeds.

Only started seeing this issue since I updated from 1.7.8 to 1.9.4

Your maturin version (maturin --version)

1.9.4

Your Python version (python -V)

3.10.9

Your pip version (pip -V)

pip 23.0

What bindings you're using

pyo3

Does cargo build work?

• Yes, it works

If on windows, have you checked that you aren't accidentally using unix path (those with the forward slash /)?

• Yes

Steps to Reproduce

Create a rust workspace

Add a crate that uses maturin

Add license path as follows in the Cargo.toml

license-file.workspace = true