In Vite build.sourcemap = true doesn't generate sourcemaps

[ivosabev]

Reproduction

Fresh project created with npx create-remix@latest --template remix-run/remix/templates/vite-express

Then add build.sourcemap to the vite.config.js

import { vitePlugin as remix } from "@remix-run/dev";
import { defineConfig } from "vite";
import tsconfigPaths from "vite-tsconfig-paths";

export default defineConfig({
  build: {
    sourcemap: true,
  },
  plugins: [remix(), tsconfigPaths()],
});

Run the build and nothing is generated.

NODE_ENV=production npm run build

> build
> remix vite:build

vite v5.1.5 building for production...
✓ 80 modules transformed.
build/client/.vite/manifest.json                0.90 kB │ gzip:  0.26 kB
build/client/assets/_index-D_UUquDl.js          0.76 kB │ gzip:  0.39 kB
build/client/assets/root-CXCOh6Pt.js            1.44 kB │ gzip:  0.83 kB
build/client/assets/jsx-runtime-BlSqMCxk.js     8.09 kB │ gzip:  3.04 kB
build/client/assets/entry.client-BJ12z_Rq.js   14.04 kB │ gzip:  5.00 kB
build/client/assets/components-t0vHlsCC.js    212.81 kB │ gzip: 68.87 kB
✓ built in 488ms
vite v5.1.5 building SSR bundle for production...
✓ 5 modules transformed.
build/server/.vite/manifest.json  0.13 kB
build/server/index.js             6.89 kB
✓ built in 13ms

[pchmn]

I think PR #8965 fixes this

[ivosabev]

Thanks for the quick reply, works with 2.8.1-pre.0

[brophdawg11]

Closing this as a dup of #8935, fixed by #8965