On Termux/Android aarch64 (and other platforms without prebuilt wheels
for some optional extras), 'pip install -e .[all]' compiles C/Rust
extensions from source. This can run for several minutes with zero
network activity and — with --quiet — zero stdout. Users report
'hermes update hangs at Updating Python dependencies', Ctrl+C it, then
re-run and see 'up to date' (because git pull already succeeded and the
pip step was still working when they interrupted).
Pip's default output is proportional to actual work (one line per
Collecting / Building wheel for X / Installing), so removing --quiet
costs nothing on fast hardware and prevents the false-hang interrupt
loop on slow hardware.
Reported via Discord on Termux/Android. Supersedes #20466 which
misdiagnosed the hang as PYTHONPATH shadowing (install.sh doesn't run
during 'hermes update', and terminal() doesn't inherit PYTHONPATH).
Teknium
a6f5f9c484