# Invalid template: undefined with worker build
Could not compile template "nuxt.config.mjs"
3.xpending triageneeds reproductionclosed-by-bot
[Nuxt 3.6.5] `nuxt build`, fail at Nitro step for "undefined"
3.xpending triage
On-the-fly template compilation is not supported in the ESM build of @vue/server-renderer.
pending triageneeds reproductionclosed-by-bot