use node current in dev

.babelrc.js

@@ -1,21 +1,29 @@
+"use strict";
+
+let envOpts = {
+  loose: true
+};
+
 module.exports = {
-  "comments": false,
-  "presets": [
+  comments: false,
+  presets: [
     [
-      "env",
-      {
-        "loose": true
-      }
+      "env", envOpts
     ],
     "stage-0",
-    "flow"
+    "flow",
   ],
-  "env": {
-    "cov": {
-      "auxiliaryCommentBefore": "istanbul ignore next",
-      "plugins": [
-        "istanbul"
-      ]
+  env: {
+    cov: {
+      auxiliaryCommentBefore: "istanbul ignore next",
+      plugins: ["istanbul"]
     }
   }
 };
+
+if (process.env.BABEL_ENV === 'development') {
+  envOpts.targets = {
+    node: "current"
+  };
+  envOpts.debug = true;
+};

Makefile

@@ -16,16 +16,16 @@ build-dist: build
 
 watch: clean
 	rm -rf packages/*/lib
-	./node_modules/.bin/gulp watch
+	BABEL_ENV=development ./node_modules/.bin/gulp watch
 
 lint:
-	./node_modules/.bin/eslint scripts packages Gulpfile.js --format=codeframe
+	./node_modules/.bin/eslint scripts packages *.js --format=codeframe
 
 flow:
 	./node_modules/.bin/flow check
 
 fix:
-	./node_modules/.bin/eslint scripts packages Gulpfile.js --format=codeframe --fix
+	./node_modules/.bin/eslint scripts packages *.js --format=codeframe --fix
 
 clean: test-clean
 	rm -rf packages/babel-polyfill/browser*

scripts/babel-register.js

@@ -2,18 +2,6 @@
 
 const babel = require("../.babelrc");
 const register = require("babel-register").default;
-const path = require("path");
-
-if (babel.plugins) {
-  // correct path of relative plugins
-  babel.plugins = babel.plugins.map(function (plugin) {
-    if (plugin.charAt(0) === ".") {
-      return plugin.replace(/^\./, path.join(__dirname, ".."));
-    }
-
-    return plugin;
-  });
-}
 
 register(babel);
 register({