Cargo Features

wasi-vfs has no features set by default.

[dependencies]
wasi-vfs = { version = "0.3.0", features = ["trace-syscall", "legacy-wasi-libc", "module-linking"] }
trace-syscall
legacy-wasi-libc
module-linking = wee_alloc

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

wee_alloc module-linking?