[R-pkg-devel] How can I avoid Solaris build on CRAN?

[Hiroaki Yutani]

Hi,

I recently submitted my package, which needs compilation of Rust code,
to CRAN. Now I'm seeing a CRAN check error on Solaris.

https://cran.r-project.org/web/checks/check_results_string2path.html

Since Solaris is not a platform supported by Rust [1], I need to avoid
building on Solaris. I assumed specifying

    SystemRequirements: Cargo (rustc package manager)

would effectively achieve this, considering this seems the only common
thing among other CRAN packages [2][3] with Rust compilation. But, it
turned out I was wrong.

Are there any ways to ask CRAN to exclude Solaris?

Best,
Hiroaki Yutani

[1]: https://doc.rust-lang.org/nightly/rustc/platform-support.html
[2]: https://cran.r-project.org/package=cargo
[3]: https://cran.r-project.org/package=baseflow