- touch $PREFIX/.build-complete after a successful install: the CI cache
rejects a restored tree without it (a failed run's partial save) and
rebuilds instead;
- the old comment claimed every ffmpeg-next/FFmpeg pairing is broken
upstream. Verified locally instead: ffmpeg-next 9.0.0 compiles against
both release/8.1 and release/9.0 (cargo check of a scratch crate and of
oak-codec against the 9.0 build), so the pinned version is a project
choice, not a compatibility workaround.
Mike-Solar
bd447e1a7d