diff --git a/packages/react-dom/package.json b/packages/react-dom/package.json
index 90b0560e42b18..fa03c71312663 100644
--- a/packages/react-dom/package.json
+++ b/packages/react-dom/package.json
@@ -50,8 +50,10 @@
     "./profiling": "./profiling.js",
     "./test-utils": "./test-utils.js",
     "./unstable_testing": "./unstable_testing.js",
-    "./package.json": "./package.json",
-    "./": "./"
+    "./testing": "./testing.js",
+    "./umd/*": "./umd/*",
+    "./src/*": "./src/*",
+    "./package.json": "./package.json"
   },
   "browser": {
     "./server.js": "./server.browser.js"
diff --git a/packages/react-server-dom-webpack/package.json b/packages/react-server-dom-webpack/package.json
index af705d975db70..96bd641ac428e 100644
--- a/packages/react-server-dom-webpack/package.json
+++ b/packages/react-server-dom-webpack/package.json
@@ -35,6 +35,7 @@
     "./writer.browser.server": "./writer.browser.server.js",
     "./node-loader": "./esm/react-server-dom-webpack-node-loader.js",
     "./node-register": "./node-register.js",
+    "./src/*": "./src/*",
     "./package.json": "./package.json"
   },
   "main": "index.js",
diff --git a/packages/react/package.json b/packages/react/package.json
index d7f2ac8d99a06..9604d2a50c080 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -27,7 +27,9 @@
     "./package.json": "./package.json",
     "./jsx-runtime": "./jsx-runtime.js",
     "./jsx-dev-runtime": "./jsx-dev-runtime.js",
-    "./": "./"
+    "./umd/*": "./umd/*",
+    "./unstable-shared-subset": "./unstable-shared-subset.js"
+
   },
   "repository": {
     "type": "git",
diff --git a/scripts/rollup/bundles.js b/scripts/rollup/bundles.js
index 4ac846e78a9a2..ba7384e3cc8ee 100644
--- a/scripts/rollup/bundles.js
+++ b/scripts/rollup/bundles.js
@@ -268,7 +268,7 @@ const bundles = [
       FB_WWW_PROD,
     ],
     moduleType: RENDERER,
-    entry: 'react-dom/src/server/ReactDOMLegacyServerBrowser',
+    entry: 'react-dom/src/server/ReactDOMLegacyServerBrowser.js',
     name: 'react-dom-server-legacy.browser',
     global: 'ReactDOMServer',
     minifyWithProdErrorCodes: true,
@@ -284,7 +284,7 @@ const bundles = [
   {
     bundleTypes: [NODE_DEV, NODE_PROD],
     moduleType: RENDERER,
-    entry: 'react-dom/src/server/ReactDOMLegacyServerNode',
+    entry: 'react-dom/src/server/ReactDOMLegacyServerNode.js',
     name: 'react-dom-server-legacy.node',
     externals: ['react', 'stream'],
     minifyWithProdErrorCodes: false,
@@ -301,7 +301,7 @@ const bundles = [
   {
     bundleTypes: [NODE_DEV, NODE_PROD, UMD_DEV, UMD_PROD],
     moduleType: RENDERER,
-    entry: 'react-dom/src/server/ReactDOMFizzServerBrowser',
+    entry: 'react-dom/src/server/ReactDOMFizzServerBrowser.js',
     name: 'react-dom-server.browser',
     global: 'ReactDOMServer',
     minifyWithProdErrorCodes: true,
@@ -311,7 +311,7 @@ const bundles = [
   {
     bundleTypes: [NODE_DEV, NODE_PROD],
     moduleType: RENDERER,
-    entry: 'react-dom/src/server/ReactDOMFizzServerNode',
+    entry: 'react-dom/src/server/ReactDOMFizzServerNode.js',
     name: 'react-dom-server.node',
     global: 'ReactDOMServer',
     minifyWithProdErrorCodes: false,
@@ -321,7 +321,7 @@ const bundles = [
   {
     bundleTypes: __EXPERIMENTAL__ ? [FB_WWW_DEV, FB_WWW_PROD] : [],
     moduleType: RENDERER,
-    entry: 'react-server-dom-relay/src/ReactDOMServerFB',
+    entry: 'react-server-dom-relay/src/ReactDOMServerFB.js',
     global: 'ReactDOMServerStreaming',
     minifyWithProdErrorCodes: false,
     wrapWithModuleBoundaries: false,
diff --git a/scripts/shared/inlinedHostConfigs.js b/scripts/shared/inlinedHostConfigs.js
index f6d349502f6ba..23d2c52dc7c87 100644
--- a/scripts/shared/inlinedHostConfigs.js
+++ b/scripts/shared/inlinedHostConfigs.js
@@ -12,7 +12,7 @@ module.exports = [
     entryPoints: [
       'react-dom',
       'react-dom/testing',
-      'react-dom/src/server/ReactDOMFizzServerNode',
+      'react-dom/src/server/ReactDOMFizzServerNode.js',
       'react-server-dom-webpack/writer.node.server',
       'react-server-dom-webpack',
     ],
@@ -34,7 +34,7 @@ module.exports = [
     entryPoints: [
       'react-dom',
       'react-dom/testing',
-      'react-dom/src/server/ReactDOMFizzServerBrowser',
+      'react-dom/src/server/ReactDOMFizzServerBrowser.js',
       'react-server-dom-webpack/writer.browser.server',
       'react-server-dom-webpack',
     ],
@@ -53,8 +53,8 @@ module.exports = [
   {
     shortName: 'dom-legacy',
     entryPoints: [
-      'react-dom/src/server/ReactDOMLegacyServerBrowser', // react-dom/server.browser
-      'react-dom/src/server/ReactDOMLegacyServerNode', // react-dom/server.node
+      'react-dom/src/server/ReactDOMLegacyServerBrowser.js', // react-dom/server.browser
+      'react-dom/src/server/ReactDOMLegacyServerNode.js', // react-dom/server.node
     ],
     paths: [
       'react-dom',
@@ -99,7 +99,7 @@ module.exports = [
     entryPoints: [
       'react-server-dom-relay',
       'react-server-dom-relay/server',
-      'react-server-dom-relay/src/ReactDOMServerFB',
+      'react-server-dom-relay/src/ReactDOMServerFB.js',
     ],
     paths: ['react-dom', 'react-server-dom-relay'],
     isFlowTyped: true,
@@ -116,7 +116,7 @@ module.exports = [
       'react-server-native-relay',
       // this is included here so that it's not included in the main native check
       // remove this when it's added to the main native renderer.
-      'react-native-renderer/src/server',
+      'react-native-renderer/src/server.js',
     ],
     isFlowTyped: true,
     isServerSupported: true,