compiling issue with import { WebSocketServer } from "npm:ws@^8.14.1"

Using this impot in a "deno run --unstable [etc...]" env works flawless / as intended but trying to compile it, all of a sudden i get

'"internal:///missing_dependency.d.ts"' has no exported member 'WebSocketServer'

'"internal:///missing_dependency.d.ts"' has no exported member 'WebSocketServer'