Is there any way to set a project to use nightly (or any toolchain) via a project's cargo.toml? I know how to set an override for a project via the rustup override command, but it seems strange to me that rustup overrides would be the only way to do this. It seems to me that actually requiring nightly is a property of a project, not a property of the machine or path that it is compiled from. So it would be good if projects had a way to specifically declare that they are built with nightly.
My motivations for this are:
- I have a few projects that use unstable features
- occasionally, I rename projects, or change where I store them, and the overrides need to be updated to use the new path
- if I ever work from a different computer, then I have to set up the override for each project on the new PC