Yep, you're probably using linux. The cache backend for compiled artifacts is filesystem extended attributes, which have a maximum size of 64MB on darwin, but a

Yep, you're probably using linux. The cache backend for compiled artifacts is filesystem extended attributes, which have a maximum size of 64MB on darwin, but as little as 4kB on some linux configurations (if they're even enabled, which they often are not). Practically speaking, the compilation caching features are not supported on linux. Eventually we'll change the cache backend or add a different one that does work on linux.