This instance will be upgraded to Heptapod 0.31.0 (final) on 2022-05-24 at 14:00 UTC+2 (a few minutes of down time)

Mercurial/Rust: fallbacking to install

Actually, `pip --target` has the effect of not providing
the main executable, whereas `--install-lib` makes a better
distinction. It still has to be supplemented with
`--prefix=/usr/local`, otherwise the resulting `hg` would
still be in `/usr/bin`, which is not expected by users of
this image (and a discrepancy with builds without Rust,
that could work with a simple `pip install Mercurial`).

I'm getty too old for this…
4 jobs for branch/default in 6 minutes and 18 seconds (queued for 2 seconds)