How to pass ignore-rust-version

[lscorcia]

Hi, I'm trying to build maturin wheel on a system that only supports rust version 1.70 (debian stable on a legacy architecture). I have been able to run cargo build and create the artifact by patching some dependencies with earlier versions. However this also requires passing --ignore-rust-version to cargo and I cannot figure out how to specify this flag when building maturin itself.

The commands I'm using is:

~/$ git clone https://github.com/PyO3/maturin.git
~/maturin$ python -m build

I tried adding ignore-rust-version = true to the tool.maturin section in pyproject.toml, but it does not seem to have any effect.

I tried snooping in the source and IIRC there is no way to read this from config files:

maturin/src/build_options.rs

Line 1417 in e403fdf

pub fn merge_with_pyproject_toml(&mut self, tool_maturin: ToolMaturin) -> Vec<&'static str> {

Can it really be specified when running maturin itself only? But I need to build maturin with this option set...

Any help?

[lscorcia]

I feel like this is a dead end. I switched to a cross-compile approach.