Compilation: prevent zig1 depending on fd_readdir

This isn't really coherent to model as a `Feature`; this makes sense
because of zig1's specific environment. As such, I opted to check
`dev.env` directly.
f9a670d46dmlugg committed on 6/12/2025, 4:51:31 PMparentde69d63
1 file changedLine totals unavailable