Hmm I have the beta 27 installed too and haven’t noticed problems so far. How did you install the zig toolchain?
My ~/.cache/zig existed before installing the beta though.
FWIW, a zig clean command would be nice which deletes the global cache and all the local .zig-* and zig-* directories (but I guess in that case it wouldn’t help much since zig wouldn’t have permission to access ~/.cache/zig.