Cargo Features

Shards has no features set by default.

[dependencies]
shards = { version = "0.1.1", features = ["dllshard"] }
dllshard = dlopen

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.

dlopen not wasm32 dllshard?