How to note require the node: prefix

deno 2.0.3 (stable, release, x86_64-unknown-linux-gnu)
v8 12.9.202.13-rusty
typescript 5.6.2

$ ~/.deno/bin/deno eval --unstable-sloppy-imports "import { existsSync } from 'fs"
error: Relative import path "fs" not prefixed with / or ./ or ../
  hint: If you want to use a built-in Node module, add a "node:" prefix (ex. "node:fs").