diff --git a/packages/babel-cli/src/_babel-node.js b/packages/babel-cli/src/_babel-node.js
index bc71abb00d..3d0e1f319d 100644
--- a/packages/babel-cli/src/_babel-node.js
+++ b/packages/babel-cli/src/_babel-node.js
@@ -9,6 +9,8 @@ import vm from "vm";
 import "babel-polyfill";
 import register from "babel-register";
 
+import pkg from "../package.json";
+
 const program = new commander.Command("babel-node");
 
 program.option("-e, --eval [script]", "Evaluate script");
@@ -19,7 +21,6 @@ program.option("-x, --extensions [extensions]", "List of extensions to hook into
 program.option("-w, --plugins [string]", "", util.list);
 program.option("-b, --presets [string]", "", util.list);
 
-const pkg = require("../package.json");
 program.version(pkg.version);
 program.usage("[options] [ -e script | script.js ] [arguments]");
 program.parse(process.argv);
diff --git a/packages/babel-cli/src/babel-node.js b/packages/babel-cli/src/babel-node.js
index ee25b5f48a..d92f0e863b 100755
--- a/packages/babel-cli/src/babel-node.js
+++ b/packages/babel-cli/src/babel-node.js
@@ -3,8 +3,8 @@
  * when found, before invoking the "real" _babel-node(1) executable.
  */
 
-const getV8Flags = require("v8flags");
-const path = require("path");
+import getV8Flags from "v8flags";
+import path from "path";
 
 let args = [path.join(__dirname, "_babel-node")];
 
diff --git a/packages/babel-cli/src/babel/dir.js b/packages/babel-cli/src/babel/dir.js
index 364e020733..91731f39fe 100644
--- a/packages/babel-cli/src/babel/dir.js
+++ b/packages/babel-cli/src/babel/dir.js
@@ -1,10 +1,11 @@
-const outputFileSync = require("output-file-sync");
-const slash          = require("slash");
-const path           = require("path");
-const util           = require("./util");
-const fs             = require("fs");
+import outputFileSync from "output-file-sync";
+import slash from "slash";
+import path from "path";
+import fs from "fs";
 
-module.exports = function (commander, filenames) {
+import * as util from "./util";
+
+export default function (commander, filenames) {
   function write(src, relative) {
     // remove extension and then append back on .js
     relative = relative.replace(/\.(\w*?)$/, "") + ".js";
@@ -88,4 +89,4 @@ module.exports = function (commander, filenames) {
       });
     });
   }
-};
+}
diff --git a/packages/babel-cli/src/babel/file.js b/packages/babel-cli/src/babel/file.js
index e143be1a39..73b5ef14fc 100644
--- a/packages/babel-cli/src/babel/file.js
+++ b/packages/babel-cli/src/babel/file.js
@@ -1,11 +1,12 @@
-const convertSourceMap = require("convert-source-map");
-const sourceMap        = require("source-map");
-const slash            = require("slash");
-const path             = require("path");
-const util             = require("./util");
-const fs               = require("fs");
+import convertSourceMap from "convert-source-map";
+import sourceMap  from "source-map";
+import slash from "slash";
+import path from "path";
+import fs from "fs";
 
-module.exports = function (commander, filenames, opts) {
+import * as util from "./util";
+
+export default function (commander, filenames, opts) {
   if (commander.sourceMaps === "inline") {
     opts.sourceMaps = true;
   }
@@ -176,4 +177,4 @@ module.exports = function (commander, filenames, opts) {
   } else {
     stdin();
   }
-};
+}
diff --git a/packages/babel-cli/src/babel/index.js b/packages/babel-cli/src/babel/index.js
index 194254bf61..2a5f4f9cd6 100755
--- a/packages/babel-cli/src/babel/index.js
+++ b/packages/babel-cli/src/babel/index.js
@@ -1,12 +1,16 @@
 #!/usr/bin/env node
 
-const fs         = require("fs");
-const commander  = require("commander");
-const kebabCase  = require("lodash/kebabCase");
-const options    = require("babel-core").options;
-const util       = require("babel-core").util;
-const uniq       = require("lodash/uniq");
-const glob       = require("glob");
+import fs        from "fs";
+import commander from "commander";
+import kebabCase from "lodash/kebabCase";
+import { options, util, version } from "babel-core";
+import uniq      from "lodash/uniq";
+import glob      from "glob";
+
+import dirCommand from "./dir";
+import fileCommand from "./file";
+
+import pkg from "../../package.json";
 
 Object.keys(options).forEach(function (key) {
   const option = options[key];
@@ -45,8 +49,7 @@ commander.option("-D, --copy-files", "When compiling a directory copy over non-c
 commander.option("-q, --quiet", "Don't log anything");
 /* eslint-enable max-len */
 
-const pkg = require("../../package.json");
-commander.version(pkg.version + " (babel-core " + require("babel-core").version + ")");
+commander.version(pkg.version + " (babel-core " + version + ")");
 commander.usage("[options] <files ...>");
 commander.parse(process.argv);
 
@@ -103,7 +106,7 @@ if (errors.length) {
 
 //
 
-const opts = exports.opts = {};
+export const opts = {};
 
 Object.keys(options).forEach(function (key) {
   const opt = options[key];
@@ -118,12 +121,5 @@ if (opts.only) {
   opts.only = util.arrayify(opts.only, util.regexify);
 }
 
-let fn;
-
-if (commander.outDir) {
-  fn = require("./dir");
-} else {
-  fn = require("./file");
-}
-
-fn(commander, filenames, exports.opts);
+const fn = commander.outDir ? dirCommand : fileCommand;
+fn(commander, filenames, opts);
diff --git a/packages/babel-cli/src/babel/util.js b/packages/babel-cli/src/babel/util.js
index 7cdff17222..e92b09c671 100644
--- a/packages/babel-cli/src/babel/util.js
+++ b/packages/babel-cli/src/babel/util.js
@@ -1,11 +1,11 @@
-const commander = require("commander");
-const defaults  = require("lodash/defaults");
-const readdir   = require("fs-readdir-recursive");
-const index     = require("./index");
-const babel     = require("babel-core");
-const util      = require("babel-core").util;
-const path      = require("path");
-const fs        = require("fs");
+import commander from "commander";
+import defaults from "lodash/defaults";
+import readdir from "fs-readdir-recursive";
+import * as babel from "babel-core";
+import path from "path";
+import fs from "fs";
+
+import * as index from "./index";
 
 export function chmod(src, dest) {
   fs.chmodSync(dest, fs.statSync(src).mode);
@@ -13,16 +13,16 @@ export function chmod(src, dest) {
 
 export function readdirFilter(filename) {
   return readdir(filename).filter(function (filename) {
-    return util.canCompile(filename);
+    return babel.util.canCompile(filename);
   });
 }
 
 export { readdir };
 
-export const canCompile = util.canCompile;
+export const canCompile = babel.util.canCompile;
 
 export function shouldIgnore(loc) {
-  return util.shouldIgnore(loc, index.opts.ignore, index.opts.only);
+  return babel.util.shouldIgnore(loc, index.opts.ignore, index.opts.only);
 }
 
 export function addSourceMappingUrl(code, loc) {
diff --git a/packages/babel-core/src/transformation/file/options/config.js b/packages/babel-core/src/transformation/file/options/config.js
index dbc60c6043..80e8bf7a00 100644
--- a/packages/babel-core/src/transformation/file/options/config.js
+++ b/packages/babel-core/src/transformation/file/options/config.js
@@ -1,6 +1,6 @@
 /* eslint max-len: "off" */
 
-module.exports = {
+export default {
   filename: {
     type: "filename",
     description: "filename to use when reading from stdin - this will be used in source-maps, errors etc",
diff --git a/packages/babel-core/src/transformation/file/options/removed.js b/packages/babel-core/src/transformation/file/options/removed.js
index cb0077cb92..6fea5223a8 100644
--- a/packages/babel-core/src/transformation/file/options/removed.js
+++ b/packages/babel-core/src/transformation/file/options/removed.js
@@ -1,6 +1,6 @@
 /* eslint max-len: "off" */
 
-module.exports = {
+export default {
   "auxiliaryComment": {
     "message": "Use `auxiliaryCommentBefore` or `auxiliaryCommentAfter`"
   },
diff --git a/packages/babel-generator/src/generators/index.js b/packages/babel-generator/src/generators/index.js
new file mode 100644
index 0000000000..61db3d68ec
--- /dev/null
+++ b/packages/babel-generator/src/generators/index.js
@@ -0,0 +1,10 @@
+export * from "./template-literals";
+export * from "./expressions";
+export * from "./statements";
+export * from "./classes";
+export * from "./methods";
+export * from "./modules";
+export * from "./types";
+export * from "./flow";
+export * from "./base";
+export * from "./jsx";
diff --git a/packages/babel-generator/src/generators/statements.js b/packages/babel-generator/src/generators/statements.js
index e1492ad77c..f6291e0165 100644
--- a/packages/babel-generator/src/generators/statements.js
+++ b/packages/babel-generator/src/generators/statements.js
@@ -219,14 +219,14 @@ export function DebuggerStatement() {
   this.semicolon();
 }
 
-function variableDeclarationIdent() {
+function variableDeclarationIndent() {
   // "let " or "var " indentation.
   this.token(",");
   this.newline();
   if (this.endsWith("\n")) for (let i = 0; i < 4; i++) this.space(true);
 }
 
-function constDeclarationIdent() {
+function constDeclarationIndent() {
   // "const " indentation.
   this.token(",");
   this.newline();
@@ -262,7 +262,7 @@ export function VariableDeclaration(node: Object, parent: Object) {
 
   let separator;
   if (hasInits) {
-    separator = node.kind === "const" ? constDeclarationIdent : variableDeclarationIdent;
+    separator = node.kind === "const" ? constDeclarationIndent : variableDeclarationIndent;
   }
 
   //
diff --git a/packages/babel-generator/src/node/index.js b/packages/babel-generator/src/node/index.js
index c885f8032b..c3a17cea6c 100644
--- a/packages/babel-generator/src/node/index.js
+++ b/packages/babel-generator/src/node/index.js
@@ -1,4 +1,4 @@
-import whitespace from "./whitespace";
+import * as whitespace from "./whitespace";
 import * as parens from "./parentheses";
 import * as t from "babel-types";
 
diff --git a/packages/babel-generator/src/node/whitespace.js b/packages/babel-generator/src/node/whitespace.js
index 1c47e594ec..e55396768b 100644
--- a/packages/babel-generator/src/node/whitespace.js
+++ b/packages/babel-generator/src/node/whitespace.js
@@ -60,7 +60,7 @@ function isType(node) {
  * Tests for node types that need whitespace.
  */
 
-exports.nodes = {
+export const nodes = {
 
   /**
    * Test if AssignmentExpression needs whitespace.
@@ -164,10 +164,10 @@ exports.nodes = {
  * Test if Property or SpreadProperty needs whitespace.
  */
 
-exports.nodes.ObjectProperty =
-exports.nodes.ObjectTypeProperty =
-exports.nodes.ObjectMethod =
-exports.nodes.SpreadProperty = function (node: Object, parent): ?WhitespaceObject {
+nodes.ObjectProperty =
+nodes.ObjectTypeProperty =
+nodes.ObjectMethod =
+nodes.SpreadProperty = function (node: Object, parent): ?WhitespaceObject {
   if (parent.properties[0] === node) {
     return {
       before: true
@@ -179,7 +179,7 @@ exports.nodes.SpreadProperty = function (node: Object, parent): ?WhitespaceObjec
  * Returns lists from node types that need whitespace.
  */
 
-exports.list = {
+export const list = {
 
   /**
    * Return VariableDeclaration declarations init properties.
@@ -222,7 +222,7 @@ exports.list = {
     amounts = { after: amounts, before: amounts };
   }
   [type].concat(t.FLIPPED_ALIAS_KEYS[type] || []).forEach(function (type) {
-    exports.nodes[type] = function () {
+    nodes[type] = function () {
       return amounts;
     };
   });
diff --git a/packages/babel-generator/src/printer.js b/packages/babel-generator/src/printer.js
index 6d164fc2fe..f5557d54f9 100644
--- a/packages/babel-generator/src/printer.js
+++ b/packages/babel-generator/src/printer.js
@@ -7,6 +7,8 @@ import * as n from "./node";
 import Whitespace from "./whitespace";
 import * as t from "babel-types";
 
+import * as generatorFunctions from "./generators";
+
 const SCIENTIFIC_NOTATION = /e/i;
 const ZERO_DECIMAL_INTEGER = /\.0+$/;
 const NON_DECIMAL_LITERAL = /^0[box]/;
@@ -572,22 +574,10 @@ export default class Printer {
   }
 }
 
+// Expose the node type functions and helpers on the prototype for easy usage.
+Object.assign(Printer.prototype, generatorFunctions);
+
 function commaSeparator() {
   this.token(",");
   this.space();
 }
-
-for (const generator of [
-  require("./generators/template-literals"),
-  require("./generators/expressions"),
-  require("./generators/statements"),
-  require("./generators/classes"),
-  require("./generators/methods"),
-  require("./generators/modules"),
-  require("./generators/types"),
-  require("./generators/flow"),
-  require("./generators/base"),
-  require("./generators/jsx")
-]) {
-  Object.assign(Printer.prototype, generator);
-}
diff --git a/packages/babel-plugin-transform-async-functions/src/index.js b/packages/babel-plugin-transform-async-functions/src/index.js
index abe7b8a0f7..20eb9f453b 100644
--- a/packages/babel-plugin-transform-async-functions/src/index.js
+++ b/packages/babel-plugin-transform-async-functions/src/index.js
@@ -1,5 +1,7 @@
+import asyncSyntaxPlugin from "babel-plugin-syntax-async-functions";
+
 export default function () {
   return {
-    inherits: require("babel-plugin-syntax-async-functions")
+    inherits: asyncSyntaxPlugin,
   };
 }
diff --git a/packages/babel-plugin-transform-async-generator-functions/src/index.js b/packages/babel-plugin-transform-async-generator-functions/src/index.js
index 3da5e7d19b..de09cfed52 100644
--- a/packages/babel-plugin-transform-async-generator-functions/src/index.js
+++ b/packages/babel-plugin-transform-async-generator-functions/src/index.js
@@ -1,4 +1,5 @@
 import remapAsyncToGenerator from "babel-helper-remap-async-to-generator";
+import syntaxAsyncGenerators from "babel-plugin-syntax-async-generators";
 
 export default function ({ types: t }) {
   const yieldStarVisitor = {
@@ -17,7 +18,7 @@ export default function ({ types: t }) {
   };
 
   return {
-    inherits: require("babel-plugin-syntax-async-generators"),
+    inherits: syntaxAsyncGenerators,
     visitor: {
       Function(path, state) {
         if (!path.node.async || !path.node.generator) return;
diff --git a/packages/babel-plugin-transform-async-to-generator/src/index.js b/packages/babel-plugin-transform-async-to-generator/src/index.js
index beabecb253..b6c1542dfd 100644
--- a/packages/babel-plugin-transform-async-to-generator/src/index.js
+++ b/packages/babel-plugin-transform-async-to-generator/src/index.js
@@ -1,8 +1,9 @@
 import remapAsyncToGenerator from "babel-helper-remap-async-to-generator";
+import syntaxAsyncFunctions from "babel-plugin-syntax-async-functions";
 
 export default function () {
   return {
-    inherits: require("babel-plugin-syntax-async-functions"),
+    inherits: syntaxAsyncFunctions,
 
     visitor: {
       Function(path, state) {
diff --git a/packages/babel-plugin-transform-async-to-module-method/src/index.js b/packages/babel-plugin-transform-async-to-module-method/src/index.js
index f9a7706ed1..5ae36b052c 100644
--- a/packages/babel-plugin-transform-async-to-module-method/src/index.js
+++ b/packages/babel-plugin-transform-async-to-module-method/src/index.js
@@ -1,8 +1,9 @@
 import remapAsyncToGenerator from "babel-helper-remap-async-to-generator";
+import syntaxAsyncFunctions from "babel-plugin-syntax-async-functions";
 
 export default function () {
   return {
-    inherits: require("babel-plugin-syntax-async-functions"),
+    inherits: syntaxAsyncFunctions,
 
     visitor: {
       Function(path, state) {
diff --git a/packages/babel-plugin-transform-class-properties/src/index.js b/packages/babel-plugin-transform-class-properties/src/index.js
index 1873757ee9..e06ea958bf 100644
--- a/packages/babel-plugin-transform-class-properties/src/index.js
+++ b/packages/babel-plugin-transform-class-properties/src/index.js
@@ -1,5 +1,6 @@
 import nameFunction from "babel-helper-function-name";
 import template from "babel-template";
+import syntaxClassProperties from "babel-plugin-syntax-class-properties";
 
 export default function ({ types: t }) {
   const findBareSupers = {
@@ -39,7 +40,7 @@ export default function ({ types: t }) {
   );
 
   return {
-    inherits: require("babel-plugin-syntax-class-properties"),
+    inherits: syntaxClassProperties,
 
     visitor: {
       Class(path, state) {
diff --git a/packages/babel-plugin-transform-decorators/src/index.js b/packages/babel-plugin-transform-decorators/src/index.js
index e05a53e798..3a8aab971f 100644
--- a/packages/babel-plugin-transform-decorators/src/index.js
+++ b/packages/babel-plugin-transform-decorators/src/index.js
@@ -1,6 +1,7 @@
 // Fork of https://github.com/loganfsmyth/babel-plugin-transform-decorators-legacy
 
 import template from "babel-template";
+import syntaxDecorators from "babel-plugin-syntax-decorators";
 
 const buildClassDecorator = template(`
   DECORATOR(CLASS_REF = INNER) || CLASS_REF;
@@ -281,7 +282,7 @@ export default function({ types: t }) {
   }
 
   return {
-    inherits: require("babel-plugin-syntax-decorators"),
+    inherits: syntaxDecorators,
 
     visitor: {
       ExportDefaultDeclaration(path) {
diff --git a/packages/babel-plugin-transform-do-expressions/src/index.js b/packages/babel-plugin-transform-do-expressions/src/index.js
index 1354c4ecfa..96cfd8f94d 100644
--- a/packages/babel-plugin-transform-do-expressions/src/index.js
+++ b/packages/babel-plugin-transform-do-expressions/src/index.js
@@ -1,6 +1,8 @@
+import syntaxDoExpressions from "babel-plugin-syntax-do-expressions";
+
 export default function () {
   return {
-    inherits: require("babel-plugin-syntax-do-expressions"),
+    inherits: syntaxDoExpressions,
 
     visitor: {
       DoExpression(path) {
diff --git a/packages/babel-plugin-transform-es2015-modules-amd/src/index.js b/packages/babel-plugin-transform-es2015-modules-amd/src/index.js
index bb9eb42c96..17338358e2 100644
--- a/packages/babel-plugin-transform-es2015-modules-amd/src/index.js
+++ b/packages/babel-plugin-transform-es2015-modules-amd/src/index.js
@@ -1,4 +1,5 @@
 import template from "babel-template";
+import transformCommonjs from "babel-plugin-transform-es2015-modules-commonjs";
 
 const buildDefine = template(`
   define(MODULE_NAME, [SOURCES], FACTORY);
@@ -58,7 +59,7 @@ export default function ({ types: t }) {
   };
 
   return {
-    inherits: require("babel-plugin-transform-es2015-modules-commonjs"),
+    inherits: transformCommonjs,
 
     pre() {
       // source strings
diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js b/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
index 74af212c55..832d1cb9dd 100644
--- a/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
@@ -1,6 +1,7 @@
 import { basename, extname } from "path";
 import template from "babel-template";
 import * as t from "babel-types";
+import transformStrictMode from "babel-plugin-transform-strict-mode";
 
 const buildRequire = template(`
   require($0);
@@ -127,7 +128,7 @@ export default function () {
   };
 
   return {
-    inherits: require("babel-plugin-transform-strict-mode"),
+    inherits: transformStrictMode,
 
     visitor: {
       ThisExpression(path, state) {
diff --git a/packages/babel-plugin-transform-es2015-modules-umd/src/index.js b/packages/babel-plugin-transform-es2015-modules-umd/src/index.js
index 46405fc0f3..25598c395b 100644
--- a/packages/babel-plugin-transform-es2015-modules-umd/src/index.js
+++ b/packages/babel-plugin-transform-es2015-modules-umd/src/index.js
@@ -1,5 +1,6 @@
 import { basename, extname } from "path";
 import template from "babel-template";
+import transformAMD from "babel-plugin-transform-es2015-modules-amd";
 
 const buildPrerequisiteAssignment = template(`
   GLOBAL_REFERENCE = GLOBAL_REFERENCE || {}
@@ -42,7 +43,7 @@ export default function ({ types: t }) {
   }
 
   return {
-    inherits: require("babel-plugin-transform-es2015-modules-amd"),
+    inherits: transformAMD,
 
     visitor: {
       Program: {
diff --git a/packages/babel-plugin-transform-exponentiation-operator/src/index.js b/packages/babel-plugin-transform-exponentiation-operator/src/index.js
index 68d2ef8c69..c58302bb3c 100644
--- a/packages/babel-plugin-transform-exponentiation-operator/src/index.js
+++ b/packages/babel-plugin-transform-exponentiation-operator/src/index.js
@@ -1,8 +1,9 @@
 import build from "babel-helper-builder-binary-assignment-operator-visitor";
+import syntaxExponentiationOperator from "babel-plugin-syntax-exponentiation-operator";
 
 export default function ({ types: t }) {
   return {
-    inherits: require("babel-plugin-syntax-exponentiation-operator"),
+    inherits: syntaxExponentiationOperator,
 
     visitor: build({
       operator: "**",
diff --git a/packages/babel-plugin-transform-export-extensions/src/index.js b/packages/babel-plugin-transform-export-extensions/src/index.js
index 5951b9e42d..95de3ef19c 100644
--- a/packages/babel-plugin-transform-export-extensions/src/index.js
+++ b/packages/babel-plugin-transform-export-extensions/src/index.js
@@ -1,3 +1,5 @@
+import syntaxExportExtensions from "babel-plugin-syntax-export-extensions";
+
 export default function ({ types: t }) {
   function build(node, nodes, scope) {
     const first = node.specifiers[0];
@@ -20,7 +22,7 @@ export default function ({ types: t }) {
   }
 
   return {
-    inherits: require("babel-plugin-syntax-export-extensions"),
+    inherits: syntaxExportExtensions,
 
     visitor: {
       ExportNamedDeclaration(path) {
diff --git a/packages/babel-plugin-transform-flow-comments/src/index.js b/packages/babel-plugin-transform-flow-comments/src/index.js
index 8abf61aa41..9ecad77d06 100644
--- a/packages/babel-plugin-transform-flow-comments/src/index.js
+++ b/packages/babel-plugin-transform-flow-comments/src/index.js
@@ -1,3 +1,5 @@
+import syntaxFlow from "babel-plugin-syntax-flow";
+
 export default function ({ types: t }) {
   function wrapInFlowComment(path, parent) {
     path.addComment("trailing", generateComment(path, parent));
@@ -12,7 +14,7 @@ export default function ({ types: t }) {
   }
 
   return {
-    inherits: require("babel-plugin-syntax-flow"),
+    inherits: syntaxFlow,
 
     visitor: {
       TypeCastExpression(path) {
diff --git a/packages/babel-plugin-transform-flow-strip-types/src/index.js b/packages/babel-plugin-transform-flow-strip-types/src/index.js
index 4b080f9258..6cbdc999e6 100644
--- a/packages/babel-plugin-transform-flow-strip-types/src/index.js
+++ b/packages/babel-plugin-transform-flow-strip-types/src/index.js
@@ -1,8 +1,10 @@
+import syntaxFlow from "babel-plugin-syntax-flow";
+
 export default function ({ types: t }) {
   const FLOW_DIRECTIVE = "@flow";
 
   return {
-    inherits: require("babel-plugin-syntax-flow"),
+    inherits: syntaxFlow,
 
     visitor: {
       Program(path, { file: { ast: { comments } } }) {
diff --git a/packages/babel-plugin-transform-function-bind/src/index.js b/packages/babel-plugin-transform-function-bind/src/index.js
index 27c20faa1e..db0225ede9 100644
--- a/packages/babel-plugin-transform-function-bind/src/index.js
+++ b/packages/babel-plugin-transform-function-bind/src/index.js
@@ -1,3 +1,5 @@
+import syntaxFunctionBind from "babel-plugin-syntax-function-bind";
+
 export default function ({ types: t }) {
   function getTempId(scope) {
     let id = scope.path.getData("functionBind");
@@ -29,7 +31,7 @@ export default function ({ types: t }) {
   }
 
   return {
-    inherits: require("babel-plugin-syntax-function-bind"),
+    inherits: syntaxFunctionBind,
 
     visitor: {
       CallExpression({ node, scope }) {
diff --git a/packages/babel-plugin-transform-object-rest-spread/src/index.js b/packages/babel-plugin-transform-object-rest-spread/src/index.js
index 91f7a0c40a..8f9b62f85e 100644
--- a/packages/babel-plugin-transform-object-rest-spread/src/index.js
+++ b/packages/babel-plugin-transform-object-rest-spread/src/index.js
@@ -1,3 +1,5 @@
+import syntaxObjectRestSpread from "babel-plugin-syntax-object-rest-spread";
+
 export default function ({ types: t }) {
   function hasRestProperty(path) {
     let foundRestProperty = false;
@@ -63,7 +65,7 @@ export default function ({ types: t }) {
   }
 
   return {
-    inherits: require("babel-plugin-syntax-object-rest-spread"),
+    inherits: syntaxObjectRestSpread,
 
     visitor: {
       // taken from transform-es2015-parameters/src/destructuring.js
diff --git a/packages/babel-plugin-transform-regenerator/src/index.js b/packages/babel-plugin-transform-regenerator/src/index.js
index e8207160e5..aaf6f168f5 100644
--- a/packages/babel-plugin-transform-regenerator/src/index.js
+++ b/packages/babel-plugin-transform-regenerator/src/index.js
@@ -1 +1 @@
-module.exports = require("regenerator-transform");
+export { default } from "regenerator-transform";
diff --git a/packages/babel-plugin-transform-runtime/src/definitions.js b/packages/babel-plugin-transform-runtime/src/definitions.js
index f6a6e25f44..bc8b733204 100644
--- a/packages/babel-plugin-transform-runtime/src/definitions.js
+++ b/packages/babel-plugin-transform-runtime/src/definitions.js
@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   builtins: {
     Symbol: "symbol",
     Promise: "promise",
diff --git a/packages/babel-traverse/src/path/index.js b/packages/babel-traverse/src/path/index.js
index c66d0e8482..9bc92df683 100644
--- a/packages/babel-traverse/src/path/index.js
+++ b/packages/babel-traverse/src/path/index.js
@@ -9,6 +9,19 @@ import Scope from "../scope";
 import * as t from "babel-types";
 import { path as pathCache } from "../cache";
 
+// NodePath is split across many files.
+import * as NodePath_ancestry from "./ancestry";
+import * as NodePath_inference from "./inference";
+import * as NodePath_replacement from "./replacement";
+import * as NodePath_evaluation from "./evaluation";
+import * as NodePath_conversion from "./conversion";
+import * as NodePath_introspection from "./introspection";
+import * as NodePath_context from "./context";
+import * as NodePath_removal from "./removal";
+import * as NodePath_modification from "./modification";
+import * as NodePath_family from "./family";
+import * as NodePath_comments from "./comments";
+
 const debug = buildDebug("babel");
 
 export default class NodePath {
@@ -151,17 +164,18 @@ export default class NodePath {
   }
 }
 
-assign(NodePath.prototype, require("./ancestry"));
-assign(NodePath.prototype, require("./inference"));
-assign(NodePath.prototype, require("./replacement"));
-assign(NodePath.prototype, require("./evaluation"));
-assign(NodePath.prototype, require("./conversion"));
-assign(NodePath.prototype, require("./introspection"));
-assign(NodePath.prototype, require("./context"));
-assign(NodePath.prototype, require("./removal"));
-assign(NodePath.prototype, require("./modification"));
-assign(NodePath.prototype, require("./family"));
-assign(NodePath.prototype, require("./comments"));
+assign(NodePath.prototype,
+  NodePath_ancestry,
+  NodePath_inference,
+  NodePath_replacement,
+  NodePath_evaluation,
+  NodePath_conversion,
+  NodePath_introspection,
+  NodePath_context,
+  NodePath_removal,
+  NodePath_modification,
+  NodePath_family,
+  NodePath_comments);
 
 for (const type of (t.TYPES: Array<string>)) {
   const typeKey = `is${type}`;