diff --git a/packages/vite/src/node/build.ts b/packages/vite/src/node/build.ts
index 9378d490531aea..c1c91bd61500e1 100644
--- a/packages/vite/src/node/build.ts
+++ b/packages/vite/src/node/build.ts
@@ -1,5 +1,6 @@
 import fs from 'fs'
 import path from 'path'
+import chalk from 'chalk'
 import { resolveConfig, UserConfig, ResolvedConfig } from './config'
 import Rollup, {
   Plugin,
@@ -13,7 +14,6 @@ import Rollup, {
 } from 'rollup'
 import { buildReporterPlugin } from './plugins/reporter'
 import { buildDefinePlugin } from './plugins/define'
-import chalk from 'chalk'
 import { buildHtmlPlugin } from './plugins/html'
 import { buildEsbuildPlugin } from './plugins/esbuild'
 import { terserPlugin } from './plugins/terser'
@@ -110,6 +110,10 @@ export interface BuildOptions {
    * configurations that are suitable for distributing libraries.
    */
   lib?: LibraryOptions | false
+  /**
+   * @internal for now
+   */
+  ssr?: boolean
 }
 
 export interface LibraryOptions {
@@ -137,6 +141,7 @@ export function resolveBuildOptions(
     write: true,
     manifest: false,
     lib: false,
+    ssr: false,
     ...raw
   }
 
@@ -344,10 +349,19 @@ export function onRollupWarning(
   allowNodeBuiltins: string[] = [],
   userOnWarn?: WarningHandlerWithDefault
 ) {
+  function doWarn() {
+    if (userOnWarn) {
+      userOnWarn(warning, warn)
+    } else {
+      warn(warning)
+    }
+  }
+
   if (warning.code === 'UNRESOLVED_IMPORT') {
     let message: string
     const id = warning.source
     const importer = warning.importer
+
     if (id && isBuiltin(id)) {
       let importingDep
       if (importer) {
@@ -377,6 +391,7 @@ export function onRollupWarning(
     }
     throw new Error(message)
   }
+
   if (
     warning.plugin === 'rollup-plugin-dynamic-import-variables' &&
     dynamicImportWarningIgnoreList.some((msg) => warning.message.includes(msg))
@@ -385,10 +400,6 @@ export function onRollupWarning(
   }
 
   if (!warningIgnoreList.includes(warning.code!)) {
-    if (userOnWarn) {
-      userOnWarn(warning, warn)
-    } else {
-      warn(warning)
-    }
+    doWarn()
   }
 }
diff --git a/packages/vite/src/node/plugins/resolve.ts b/packages/vite/src/node/plugins/resolve.ts
index f1471def6256f5..7ce0bb47cceb35 100644
--- a/packages/vite/src/node/plugins/resolve.ts
+++ b/packages/vite/src/node/plugins/resolve.ts
@@ -15,7 +15,7 @@ import {
   fsPathFromId,
   resolveFrom
 } from '../utils'
-import { ViteDevServer } from '..'
+import { ResolvedConfig, ViteDevServer } from '..'
 import slash from 'slash'
 import { createFilter } from '@rollup/pluginutils'
 import { PartialResolvedId } from 'rollup'
@@ -47,7 +47,8 @@ export function resolvePlugin({
   asSrc,
   dedupe
 }: ResolveOptions): Plugin {
-  let server: ViteDevServer
+  let config: ResolvedConfig | undefined
+  let server: ViteDevServer | undefined
 
   return {
     name: 'vite:resolve',
@@ -56,9 +57,18 @@ export function resolvePlugin({
       server = _server
     },
 
+    configResolved(_config) {
+      config = _config
+    },
+
     resolveId(id, importer) {
       let res
 
+      // fast path for commonjs proxy modules
+      if (/\?commonjs/.test(id) || id === 'commonjsHelpers.js') {
+        return
+      }
+
       // explicit fs paths that starts with /@fs/*
       if (asSrc && id.startsWith(FS_PREFIX)) {
         const fsPath = fsPathFromId(id)
@@ -117,7 +127,8 @@ export function resolvePlugin({
 
       // bare package imports, perform node resolve
       if (bareImportRE.test(id)) {
-        if (isBuild && isBuiltin(id)) {
+        // externalize node built-ins only when building for ssr
+        if (isBuild && config && config.build.ssr && isBuiltin(id)) {
           return {
             id,
             external: true