@ehuss I think this should be merged now.

We should wait for the nightly to be published, no?

@Kobzol That would have been an ideal thing to have done before the original post was up, yes. :)

As it stands, the post is already up, and this PR adds a date for what nightly you actually need, and an additional warning to not set it in RUSTFLAGS.

@Kobzol That would have been an ideal thing to have done before the original post was up, yes. :)

As it stands, the post is already up, and this PR adds a date for what nightly you actually need, and an additional warning to not set it in RUSTFLAGS.

I just wanted to avoid further confusion, because if you did rustup update nightly yesterday, you would see this:

info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'
info: latest update on 2025-07-16, rust version 1.90.0-nightly (... 2025-07-15)

Rustup prints "latest update on <today>", but the actual installed nightly version is from the day before. So it's a bit confusing (it has certainly confused me). As people might have thought that they already have the right version if they updated nightly yesterday, and the blog post told them that they need -16.