Starting with dev-lang/flutter-bin-3.47.0-r1, the package-managed Flutter SDK under /opt/flutter is treated as immutable. Flutter's writable runtime cache is seeded into each user's cache directory instead of modifying /opt/flutter at runtime.
By default, the Flutter binary/artifact cache is stored under:
${XDG_CACHE_HOME:-$HOME/.cache}/flutter/<version>/bin-cache
and the pub cache is stored under:
${XDG_CACHE_HOME:-$HOME/.cache}/flutter/pub-cache
The initial run may therefore copy a substantial amount of data into the user's cache and temporarily increase disk usage. Multiple users will have separate writable caches.
Users and service environments may override these locations explicitly with FLUTTER_CACHE_DIR and PUB_CACHE. When both are set, the launcher does not require HOME or XDG_CACHE_HOME.
Old per-version Flutter cache directories may be removed manually when they are no longer needed. They will be recreated from the installed SDK if required.
By default, the Flutter binary/artifact cache is stored under:
${XDG_CACHE_HOME:-$HOME/.cache}/flutter/<version>/bin-cache
and the pub cache is stored under:
${XDG_CACHE_HOME:-$HOME/.cache}/flutter/pub-cache
The initial run may therefore copy a substantial amount of data into the user's cache and temporarily increase disk usage. Multiple users will have separate writable caches.
Users and service environments may override these locations explicitly with FLUTTER_CACHE_DIR and PUB_CACHE. When both are set, the launcher does not require HOME or XDG_CACHE_HOME.
Old per-version Flutter cache directories may be removed manually when they are no longer needed. They will be recreated from the installed SDK if required.