# RollupError in Nuxt 4 module.
[Nitro/Unenv] cloudflare build has issues with unenv
3.xpending triageupstream
RollupError: Entry module "../../node_modules/nuxt/node_modules/nitropack/dist/runtime/entries/nitro-prerenderer" cannot be external.
3.xpending triageneeds reproduction
Production Build Fails: "default" is not exported by "node_modules/unenv/runtime/polyfill/process.mjs"
pending triagenitroneeds reproduction
Rollup failed to resolve import "@unhead/vue" for nuxt layers parent
3.xbug🔨 p3-minorlayers
Nuxt 4.20 delivers CommonJS builds to browser
pending triagepossible regression