diff --git a/packages/babel-core/package.json b/packages/babel-core/package.json
index 25229fadc740..f22326d78eb3 100644
--- a/packages/babel-core/package.json
+++ b/packages/babel-core/package.json
@@ -3,7 +3,6 @@
   "version": "7.7.2",
   "description": "Babel compiler core.",
   "main": "lib/index.js",
-  "_main:used-by-babel-standalone": "src/index.js",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
   "license": "MIT",
@@ -35,9 +34,7 @@
   },
   "browser": {
     "./lib/config/files/index.js": "./lib/config/files/index-browser.js",
-    "./lib/transform-file.js": "./lib/transform-file-browser.js"
-  },
-  "_browser:used-by-babel-standalone": {
+    "./lib/transform-file.js": "./lib/transform-file-browser.js",
     "./src/config/files/index.js": "./src/config/files/index-browser.js",
     "./src/transform-file.js": "./src/transform-file-browser.js"
   },
diff --git a/scripts/gulp-tasks.js b/scripts/gulp-tasks.js
index 42ebf5b6917a..8118932a8899 100644
--- a/scripts/gulp-tasks.js
+++ b/scripts/gulp-tasks.js
@@ -29,10 +29,7 @@ function generateResolveAlias() {
   const alias = {};
   const packagePath = path.resolve(process.cwd(), "packages");
   fs.readdirSync(packagePath).forEach(folder => {
-    if (["babel-core"].includes(folder)) {
-      return;
-    }
-    alias[folder.replace("babel-", "@babel/")] = path.resolve(
+    alias[folder.replace("babel-", "@babel/") + "$"] = path.resolve(
       packagePath,
       folder,
       "src"
@@ -100,8 +97,6 @@ function webpackBuild(opts) {
     resolve: {
       //todo: remove resolve.alias when babel packages offer ESModule entry
       alias: generateResolveAlias(),
-      aliasFields: ["_browser:used-by-babel-standalone", "browser"],
-      mainFields: ["_main:used-by-babel-standalone", "main"],
       plugins: [
         // Dedupe packages that are used across multiple plugins.
         // This replaces DedupePlugin from Webpack 1.x