fresh project just cloned from repo, and ran typescript setup script.
Getting warning when run npm run build:
Plugin typescript: @rollup/plugin-typescript: Typescript 'sourceMap' compiler option must be set to generate source maps.

checked that sourceMap is actually set to true in @tsconfig/svelte/tsconfig.json

    /**
      To have warnings/errors of the Svelte compiler at the correct position,
      enable source maps by default.
     */
    "sourceMap": true,