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v3: Cant extend config #4129
Description
Environment
Nitro 3.0.260311-beta
Describe the bug
Extending a config object throws:
Cannot extend config from { ... }
Reproduction
Reproduction: https://github.com/MickL/nitro-extend-config-bug
nitro.config.ts:
import { defineConfig } from 'nitro';
import { baseConfig } from './base.config.ts';
export default defineConfig({
extends: baseConfig,
serverDir: './',
});base.config.ts:
import { defineConfig } from 'nitro';
export const baseConfig = defineConfig({
runtimeConfig: {
databaseUrl: '',
},
});
Activity
Mishra-coder commentedon Mar 20, 2026
Hi! I’d like to work on this issue. Could you please assign it to me? I’ll make sure to follow the contribution guidelines. Thanks!
MickL commentedon Mar 20, 2026
@pi0
RihanArfan commentedon Apr 10, 2026
@Mishra-coder feel free to open a PR even if the issue isn't assigned to you :)
pi0 commentedon Apr 10, 2026
self assigned since have to investigate this...
MickL commentedon Aug 9, 2026
@pi0 I saw a beta was released but extending configs is still broken right?