new meteor-babel version

npm-packages/meteor-babel/options.js

@@ -185,13 +185,13 @@ function getDefaultsForNode8(features) {
 
     // Ensure that async functions run in a Fiber, while also taking
     // full advantage of native async/await support in Node 8.
-    if (!process.env.DISABLE_FIBERS) {
-      combined.plugins.push([require("./plugins/async-await.js"), {
-        // Do not transform `await x` to `Promise.await(x)`, since Node
-        // 8 has native support for await expressions.
-        useNativeAsyncAwait: false
-      }]);
-    }
+
+    combined.plugins.push([require("./plugins/async-await.js"), {
+      // Do not transform `await x` to `Promise.await(x)`, since Node
+      // 8 has native support for await expressions.
+      useNativeAsyncAwait: !process.env.DISABLE_FIBERS,
+      isFiberDisabled: process.env.DISABLE_FIBERS,
+    }]);
 
     // Enable async generator functions proposal.
     combined.plugins.push(require("@babel/plugin-proposal-async-generator-functions"));

npm-packages/meteor-babel/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@meteorjs/babel",
   "author": "Meteor <dev@meteor.com>",
-  "version": "7.17.2-beta.0",
+  "version": "7.18.0-beta.0",
   "license": "MIT",
   "description": "Babel wrapper package for use with Meteor",
   "keywords": [

npm-packages/meteor-babel/plugins/async-await.js

@@ -9,7 +9,7 @@ module.exports = function (babel) {
       Function: {
         exit: function (path) {
           const node = path.node;
-          if (! node.async) {
+          if (!node.async || this.opts.isFiberDisabled) {
             return;
           }