diff --git a/.gitignore b/.gitignore
index 8864477..a5287cc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 dist/
 node_modules/
-/lib/
+/index.js
+/yaml.worker.js
 *.log
+*.map
 *.tgz
diff --git a/.prettierignore b/.prettierignore
index e385c65..3a06416 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,3 +1,3 @@
-/dist/
-/lib/
-/out/
+dist/
+/index.js
+/yaml.worker.js
diff --git a/build.js b/build.js
index ace46af..1dd52bb 100755
--- a/build.js
+++ b/build.js
@@ -1,60 +1,53 @@
-const { promises: fs } = require('fs');
-const { join } = require('path');
-
 const { build } = require('esbuild');
 
 const { dependencies, peerDependencies } = require('./package.json');
 
-fs.rm(join(__dirname, 'lib'), { force: true, recursive: true })
-  .then(() =>
-    build({
-      entryPoints: ['src/monaco.contribution.ts', 'src/yaml.worker.ts'],
-      bundle: true,
-      external: Object.keys({ ...dependencies, ...peerDependencies }),
-      logLevel: 'info',
-      outdir: 'lib/esm',
-      sourcemap: true,
-      format: 'esm',
-      target: ['es2019'],
-      plugins: [
-        {
-          name: 'alias',
-          setup({ onResolve }) {
-            // The yaml language service only imports re-exports of vscode-languageserver-types from
-            // vscode-languageserver.
-            onResolve({ filter: /^vscode-languageserver(\/node|-protocol)?$/ }, () => ({
-              path: 'vscode-languageserver-types',
-              external: true,
-            }));
-            // The yaml language service uses path. We can stub it using path-browserify.
-            onResolve({ filter: /^path$/ }, () => ({
-              path: 'path-browserify',
-              external: true,
-            }));
-            // The main prettier entry point contains all of Prettier.
-            // The standalone bundle is smaller and works fine for us.
-            onResolve({ filter: /^prettier/ }, ({ path }) => ({
-              path: path === 'prettier' ? 'prettier/standalone.js' : `${path}.js`,
-              external: true,
-            }));
-            // This tiny filler implementation serves all our needs.
-            onResolve({ filter: /vscode-nls/ }, () => ({
-              path: require.resolve('./src/fillers/vscode-nls.ts'),
-            }));
-            // The language server dependencies tend to write both ESM and UMD output alongside each
-            // other, then use UMD for imports. We prefer ESM.
-            onResolve({ filter: /\/umd\// }, (args) => ({
-              path: require.resolve(args.path.replace(/\/umd\//, '/esm/'), {
-                paths: [args.resolveDir],
-              }),
-            }));
-          },
-        },
-      ],
-    }),
-  )
-  .catch((error) => {
-    // eslint-disable-next-line no-console
-    console.error(error);
-    process.exit(1);
-  });
+build({
+  entryPoints: ['src/index.ts', 'src/yaml.worker.ts'],
+  bundle: true,
+  external: Object.keys({ ...dependencies, ...peerDependencies }),
+  logLevel: 'info',
+  outdir: '.',
+  sourcemap: true,
+  format: 'esm',
+  target: ['es2019'],
+  plugins: [
+    {
+      name: 'alias',
+      setup({ onResolve }) {
+        // The yaml language service only imports re-exports of vscode-languageserver-types from
+        // vscode-languageserver.
+        onResolve({ filter: /^vscode-languageserver(\/node|-protocol)?$/ }, () => ({
+          path: 'vscode-languageserver-types',
+          external: true,
+        }));
+        // The yaml language service uses path. We can stub it using path-browserify.
+        onResolve({ filter: /^path$/ }, () => ({
+          path: 'path-browserify',
+          external: true,
+        }));
+        // The main prettier entry point contains all of Prettier.
+        // The standalone bundle is smaller and works fine for us.
+        onResolve({ filter: /^prettier/ }, ({ path }) => ({
+          path: path === 'prettier' ? 'prettier/standalone.js' : `${path}.js`,
+          external: true,
+        }));
+        // This tiny filler implementation serves all our needs.
+        onResolve({ filter: /vscode-nls/ }, () => ({
+          path: require.resolve('./src/fillers/vscode-nls.ts'),
+        }));
+        // The language server dependencies tend to write both ESM and UMD output alongside each
+        // other, then use UMD for imports. We prefer ESM.
+        onResolve({ filter: /\/umd\// }, (args) => ({
+          path: require.resolve(args.path.replace(/\/umd\//, '/esm/'), {
+            paths: [args.resolveDir],
+          }),
+        }));
+      },
+    },
+  ],
+}).catch((error) => {
+  // eslint-disable-next-line no-console
+  console.error(error);
+  process.exit(1);
+});
diff --git a/examples/demo/src/index.ts b/examples/demo/src/index.ts
index e79dc46..626abc1 100644
--- a/examples/demo/src/index.ts
+++ b/examples/demo/src/index.ts
@@ -31,7 +31,7 @@ window.MonacoEnvironment = {
       case 'editorWorkerService':
         return new Worker(new URL('monaco-editor/esm/vs/editor/editor.worker', import.meta.url));
       case 'yaml':
-        return new Worker(new URL('monaco-yaml/lib/esm/yaml.worker', import.meta.url));
+        return new Worker(new URL('monaco-yaml/yaml.worker', import.meta.url));
       default:
         throw new Error(`Unknown label ${label}`);
     }
diff --git a/examples/vite-example/index.js b/examples/vite-example/index.js
index e08bf59..abbd5df 100644
--- a/examples/vite-example/index.js
+++ b/examples/vite-example/index.js
@@ -1,7 +1,7 @@
 import { editor, Uri } from 'monaco-editor';
 import EditorWorker from 'monaco-editor/esm/vs/editor/editor.worker?worker';
 import { setDiagnosticsOptions } from 'monaco-yaml';
-import YamlWorker from 'monaco-yaml/lib/esm/yaml.worker?worker';
+import YamlWorker from 'monaco-yaml/yaml.worker?worker';
 
 window.MonacoEnvironment = {
   getWorker(moduleId, label) {
diff --git a/package.json b/package.json
index f7a3baa..250bf00 100644
--- a/package.json
+++ b/package.json
@@ -7,12 +7,11 @@
     "prepack": "node build.js",
     "prepare": "husky install"
   },
-  "main": "./lib/esm/monaco.contribution.js",
-  "module": "./lib/esm/monaco.contribution.js",
   "typings": "./index.d.ts",
   "files": [
-    "lib",
-    "index.d.ts"
+    "index.js",
+    "index.d.ts",
+    "yaml.worker.js"
   ],
   "workspaces": [
     "examples/*"
diff --git a/src/monaco.contribution.ts b/src/index.ts
similarity index 100%
rename from src/monaco.contribution.ts
rename to src/index.ts