vitest config type issue

[JSteunou]

Using vitest 4.0.18 and vite 7.3.1 underneath (all transient deps checked) and unplugin-swc 1.5.9 I have this type issue in my plugins config

import swc from 'unplugin-swc'
import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    alias: {
      src: '/src',
    },
    setupFiles: ['src/test/vitest.setup.ts'],
  },
  // This is from nestjs documentation
  plugins: [
    // This is required to build the test files with SWC
    swc.vite({
      // Explicitly set the module type to avoid inheriting this value from a `.swcrc` config file
      module: { type: 'es6' },
    }),
  ],
})

vitest.config.ts:15:5 - error TS2769: No overload matches this call.
  The last overload gave the following error.
    Type 'Plugin<any>' is not assignable to type 'PluginOption'.
      Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").Plugin<any>' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").Plugin<any>'.
        Types of property 'hotUpdate' are incompatible.
          Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").ObjectHook<(this: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").MinimalPluginContext & { ...; }, options: import("/home/jsteunou/Projects/lyn...' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").ObjectHook<(this: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").MinimalPluginContext & { ...; }, options: import("/home/jsteunou/Projects/lyn...'. Two different types with this name exist, but they are unrelated.
            Type '{ handler: (this: MinimalPluginContext & { environment: DevEnvironment; }, options: HotUpdateOptions) => void | EnvironmentModuleNode[] | Promise<...>; order?: "post" | ... 2 more ... | undefined; }' is not assignable to type 'ObjectHook<(this: MinimalPluginContext & { environment: DevEnvironment; }, options: HotUpdateOptions) => void | EnvironmentModuleNode[] | Promise<...>> | undefined'.
              Type '{ handler: (this: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").MinimalPluginContext & { ...; }, options: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4...' is not assignable to type '{ handler: (this: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").MinimalPluginContext & { ...; }, options: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@...'.
                Types of property 'handler' are incompatible.
                  Type '(this: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").MinimalPluginContext & { ...; }, options: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@...' is not assignable to type '(this: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/rollup@4.53.3/node_modules/rollup/dist/rollup").MinimalPluginContext & { ...; }, options: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml...'.
                    Types of parameters 'options' and 'options' are incompatible.
                      Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").HotUpdateOptions' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").HotUpdateOptions'.
                        The types of 'server.config.builder' are incompatible between these types.
                          Type '(import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>) | undefined' is not assignable to type '(import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>) | undefined'.
                            Type 'BuilderOptions & Required<BuilderOptions>' is not assignable to type '(BuilderOptions & Required<BuilderOptions>) | undefined'.
                              Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>'.
                                Type 'BuilderOptions & Required<BuilderOptions>' is not assignable to type 'BuilderOptions'.
                                  Types of property 'buildApp' are incompatible.
                                    Type '(builder: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder) => Promise<...>' is not assignable to type '(builder: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder) => Promise<...>'.
                                      Types of parameters 'builder' and 'builder' are incompatible.
                                        Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder'.
                                          Types of property 'environments' are incompatible.
                                            Type 'Record<string, import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment>' is not assignable to type 'Record<string, import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment>'.
                                              'string' index signatures are incompatible.
                                                Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment'.
                                                  The types returned by 'getTopLevelConfig().builder' are incompatible between these types.
                                                    Type '(import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>) | undefined' is not assignable to type '(import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>) | undefined'.
                                                      Type 'BuilderOptions & Required<BuilderOptions>' is not assignable to type '(BuilderOptions & Required<BuilderOptions>) | undefined'.
                                                        Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>'.
                                                          Type 'BuilderOptions & Required<BuilderOptions>' is not assignable to type 'BuilderOptions'.
                                                            Types of property 'buildApp' are incompatible.
                                                              Type '(builder: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder) => Promise<...>' is not assignable to type '(builder: import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder) => Promise<...>'.
                                                                Types of parameters 'builder' and 'builder' are incompatible.
                                                                  Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").ViteBuilder'.
                                                                    Types of property 'environments' are incompatible.
                                                                      Type 'Record<string, import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment>' is not assignable to type 'Record<string, import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment>'.
                                                                        'string' index signatures are incompatible.
                                                                          Type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment' is not assignable to type 'import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuildEnvironment'.
                                                                            The types returned by 'getTopLevelConfig().builder' are incompatible between these types.
                                                                              Type '(import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@20.19.33_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>) | undefined' is not assignable to type '(import("/home/jsteunou/Projects/myproject/node_modules/.pnpm/vite@7.3.1_@types+node@22.19.1_jiti@2.6.1_lightningcss@1.30.2_terser@5.44.1_tsx@4.21.0_yaml@2.8.2/node_modules/vite/dist/node/index").BuilderOptions & Required<...>) | undefined'.
                                                                                Type 'BuilderOptions & Required<BuilderOptions>' is not assignable to type '(BuilderOptions & Required<BuilderOptions>) | undefined'.

15     swc.vite({
       ~~~~~~~~~~
16       // Explicitly set the module type to avoid inheriting this value from a `.swcrc` config file
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17       module: { type: 'es6' },
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
18     }),
   ~~~~~~

  ../../node_modules/.pnpm/vitest@4.0.18_@opentelemetry+api@1.9.0_@types+node@20.19.33_@vitest+ui@4.0.18_happy-dom_756a295e1b10555d133eda10a4133093/node_modules/vitest/dist/config.d.ts:97:18 - The last overload is declared here.
    97 declare function defineConfig(config: ViteUserConfigExport): ViteUserConfigExport;
                        ~~~~~~~~~~~~


Found 1 error in vitest.config.ts:15

/home/jsteunou/Projects/myproject/apps/back:

Could it be a bug between vitest / unplugin ? Issue on my side ? I am using pnpm in a monorepo, no fancy stuff... :/

I checked all related packages version, update those that could be, dedupe some, ... nothing.

[JSteunou]

Sorry, found it, it was an issue with multiple @types/node packages. Hope my misery will help future others is the same issue 🥲