diff --git a/docs/devs/plugin-migration-to-2.1.md b/docs/devs/plugin-migration-to-2.1.md
index 697fafbb..677b8053 100644
--- a/docs/devs/plugin-migration-to-2.1.md
+++ b/docs/devs/plugin-migration-to-2.1.md
@@ -54,7 +54,6 @@ These are left as imports in the plugin bundle and resolved by the browser, ther
 Everything else is bundled into the plugin, including `@ant-design/icons`.
 Import `react-dom/client` and `react/jsx-runtime` by those names, other subpaths of the shared packages are bundled as a separate copy.
 
-Vite does not provide Node.js modules to plugin code.
-If your web code imports `events`, `path` or similar, add the browser package for it (`events`, `path-browserify`) to your dependencies.
+Imports of `assert`, `buffer`, `events`, `os`, `path`, `process`, `stream`, `util` and `zlib` resolve to the same browser packages as before, provided by `@clusterio/web_ui`.
 
 The `container` property of `WebPluginContext` is now the plugin's ES module namespace, `await container.get("./web")` returns the module instead of a factory function.
diff --git a/packages/lib/package.json b/packages/lib/package.json
index 79605060..b38ab998 100644
--- a/packages/lib/package.json
+++ b/packages/lib/package.json
@@ -54,19 +54,10 @@
 		"@types/yauzl": "catalog:",
 		"@types/yazl": "catalog:",
 		"ajv": "^8.20.0",
-		"assert": "^2.1.0",
-		"browserify-zlib": "^0.2.0",
-		"buffer": "^6.0.3",
 		"chalk": "catalog:",
-		"events": "^3.3.0",
 		"fast-deep-equal": "^3.1.3",
-		"os-browserify": "^0.3.0",
-		"path-browserify": "^1.0.1",
-		"process": "^0.11.10",
 		"set-blocking": "catalog:",
-		"stream-browserify": "^3.0.0",
 		"triple-beam": "^1.4.1",
-		"util": "^0.12.5",
 		"winston": "catalog:",
 		"winston-transport": "catalog:",
 		"ws": "catalog:",
diff --git a/packages/lib/src/browser_polyfills.ts b/packages/lib/src/browser_polyfills.ts
index 6f901993..1c442d68 100644
--- a/packages/lib/src/browser_polyfills.ts
+++ b/packages/lib/src/browser_polyfills.ts
@@ -1,7 +1,6 @@
 // Node.js globals used by lib and its dependencies when running in a browser.
-// @ts-expect-error process has no type declarations
-import process from "process/browser.js";
-import { Buffer } from "buffer/";
+import process from "process";
+import { Buffer } from "buffer";
 
 // Vite's development server may already have created process.env
 if (typeof globalThis.process?.nextTick !== "function") {
diff --git a/packages/web_ui/package.json b/packages/web_ui/package.json
index 647277f2..3f010034 100644
--- a/packages/web_ui/package.json
+++ b/packages/web_ui/package.json
@@ -38,7 +38,13 @@
 		"@sinclair/typebox": "catalog:",
 		"@vitejs/plugin-react": "catalog:",
 		"antd": "catalog:",
+		"assert": "^2.1.0",
+		"browserify-zlib": "^0.2.0",
+		"buffer": "^6.0.3",
 		"events": "^3.3.0",
+		"os-browserify": "^0.3.0",
+		"path-browserify": "^1.0.1",
+		"process": "^0.11.10",
 		"rc-field-form": "^1.44.0",
 		"react": "catalog:",
 		"react-dom": "catalog:",
@@ -46,7 +52,9 @@
 		"react-router": "catalog:",
 		"react-router-dom": "catalog:",
 		"semver": "catalog:",
+		"stream-browserify": "^3.0.0",
 		"typescript": "catalog:",
+		"util": "^0.12.5",
 		"vite": "catalog:"
 	},
 	"devDependencies": {
diff --git a/packages/web_ui/vite.mjs b/packages/web_ui/vite.mjs
index 3532a96f..48f0bd2a 100644
--- a/packages/web_ui/vite.mjs
+++ b/packages/web_ui/vite.mjs
@@ -5,6 +5,7 @@ import path from "node:path";
 import util from "node:util";
 import { createRequire } from "node:module";
 import { execFile } from "node:child_process";
+import { fileURLToPath } from "node:url";
 
 import react from "@vitejs/plugin-react";
 import { normalizePath } from "vite";
@@ -32,6 +33,20 @@ const esmSharedModules = new Set(["@clusterio/lib", "@clusterio/web_ui"]);
 // Only the console transport of winston works in the browser, and the colour
 // library used by it does not.
 const stubbedModules = /node_modules\/(winston\/dist\/winston\/transports\/(http|file)\.js|@colors\/colors\/)/;
+// Browser versions of Node.js modules, resolved from web_ui so lib and plugins
+// don't need them as dependencies.
+const polyfills = {
+	assert: "assert/",
+	buffer: "buffer/",
+	events: "events/",
+	os: "os-browserify/browser",
+	path: "path-browserify",
+	process: "process/browser.js",
+	stream: "stream-browserify",
+	util: "util/",
+	zlib: "browserify-zlib",
+};
+const webUiPackage = fileURLToPath(new URL("./package.json", import.meta.url));
 const sharedPrefix = "\0clusterio:shared/";
 const pluginPrefix = "\0clusterio:plugin/";
 
@@ -134,9 +149,19 @@ const stubs = {
 	},
 };
 
+const polyfillResolver = {
+	name: "clusterio:polyfills",
+	resolveId(id, _importer, options) {
+		const target = polyfills[id.replace(/^node:/, "")];
+		if (!target) {
+			return null;
+		}
+		return this.resolve(target, webUiPackage, { ...options, skipSelf: true });
+	},
+};
+
 /** Base config needed to build code that imports @clusterio/lib for the browser. */
 function browserCompat() {
-	const alias = (find, replacement) => ({ find: new RegExp(`^(node:)?${find}$`), replacement });
 	return {
 		name: "clusterio:browser-compat",
 		enforce: "pre",
@@ -153,20 +178,10 @@ function browserCompat() {
 					"process.env.BUILD_OS": JSON.stringify(os.platform()),
 				},
 				optimizeDeps: {
-					rolldownOptions: { plugins: [stubs] },
+					rolldownOptions: { plugins: [polyfillResolver, stubs] },
 				},
 				resolve: {
-					alias: [
-						alias("assert", "assert/"),
-						alias("buffer", "buffer/"),
-						alias("events", "events/"),
-						alias("os", "os-browserify/browser"),
-						alias("path", "path-browserify"),
-						alias("stream", "stream-browserify"),
-						alias("util", "util/"),
-						alias("zlib", "browserify-zlib"),
-						{ find: /^node:(.*)$/, replacement: "$1" },
-					],
+					alias: [{ find: /^node:(.*)$/, replacement: "$1" }],
 				},
 				build: {
 					target: "es2022",
@@ -185,6 +200,7 @@ function browserCompat() {
 				},
 			};
 		},
+		resolveId: polyfillResolver.resolveId,
 		load: stubs.load,
 		transform(code, id) {
 			if (id.endsWith(".md")) {