In my case, fable compile triggered by every change after pnpm run dev (alias for fable watch --run vite) never complete for some reason.
Therefore I run both pnpm run start (alias for vite), pnpm run watch(alias for fable watch) on different terminal...
pnpm run build generates dist/. Despite setting "homepage": "." in package.json, dist/index.html's <script src="/assets/hoge.js"> path still starts with /.
pnpm run fix (alias for sed command) removes that / to avoid NotFound error, make the builds correctly works.