The cleanup string repeated across 14 process-updates-* files had:
- /mnt/cache/pkgcache/R/pkgcache listed twice (harmless duplicate)
- /mnt/cache/R-pkgs/00LOCK-pak/mnt/cache/R-pkgs/00LOCK-RPostgres
(missing space, ends up rm'ing a nonsense nested path)
Collapse to the same form weekly-rebuild-missing-* already uses:
rm -rf /mnt/cache/R-pkgs/00LOCK-* \
/mnt/cache/R-pkgs/{bincraft,pkgcache} \
/mnt/cache/pkgcache/R/pkgcache
00LOCK-* covers every stale lock (pak, bincraft, RPostgres,
r-pkg-binaries, ...) without enumerating them.