You may find that other platforms work, but these are our officially
supported build environments that are most likely to work.
-Rust currently needs about 1.5 GiB of RAM to build without swapping; if it hits
+Rust currently needs between 600MiB and 1.5GiB to build, depending on platform. If it hits
swap, it will take a very long time to build.
There is more advice about hacking on Rust in [CONTRIBUTING.md].