$ cargo install wkg
[...SNIP...]
   Installed package `wkg v0.2.0` (executable `wkg`)

$ wkg get wasi:cli
No version specified; fetching version list...
Getting wasi:cli@0.2.0...
Wrote './wasi_cli@0.2.0.wit'

$ head -1 wasi_cli@0.2.0.wit
package wasi:cli@0.2.0;

$ wkg get --registry lann.wa.dev lann:hello-world@1.0.0
Getting lann:hello-world@1.0.0...
Wrote './lann_hello-world@1.0.0.wasm'

$ wasmtime run lann_hello-world@1.0.0.wasm
Hello, world!