diff --git a/packages/babel-core/src/transformation/file/options/option-manager.js b/packages/babel-core/src/transformation/file/options/option-manager.js
index 3e6209abfc..7a106f8ada 100644
--- a/packages/babel-core/src/transformation/file/options/option-manager.js
+++ b/packages/babel-core/src/transformation/file/options/option-manager.js
@@ -181,12 +181,10 @@ export default class OptionManager {
           this.log.error(`Using removed Babel 5 option: ${alias}.${key} - ${removed[key].message}`,
             ReferenceError);
         } else {
-          /* eslint-disable max-len */
+          // eslint-disable-next-line max-len
           const unknownOptErr = `Unknown option: ${alias}.${key}. Check out http://babeljs.io/docs/usage/options/ for more information about options.`;
-          const presetConfigErr = "A common cause of this error is the presence of a configuration options object without the corresponding preset name. Example:\n\nInvalid:\n  `{ presets: [{option: value}] }`\nValid:\n  `{ presets: [['presetName', {option: value}]] }`\n\nFor more detailed information on preset configuration, please see http://babeljs.io/docs/plugins/#pluginpresets-options.";
-          /* eslint-enable max-len */
 
-          this.log.error(`${unknownOptErr}\n\n${presetConfigErr}`, ReferenceError);
+          this.log.error(unknownOptErr, ReferenceError);
         }
       }
     }
@@ -250,72 +248,65 @@ export default class OptionManager {
    * or a module name to require.
    */
   resolvePresets(presets: Array<string | Object>, dirname: string, onResolve?) {
-    return presets.map((val) => {
+    return presets.map((preset) => {
       let options;
-      if (Array.isArray(val)) {
-        if (val.length > 2) {
-          throw new Error(`Unexpected extra options ${JSON.stringify(val.slice(2))} passed to preset.`);
+      if (Array.isArray(preset)) {
+        if (preset.length > 2) {
+          throw new Error(`Unexpected extra options ${JSON.stringify(preset.slice(2))} passed to preset.`);
         }
 
-        [val, options] = val;
+        [preset, options] = preset;
       }
 
       let presetLoc;
       try {
-        if (typeof val === "string") {
-          presetLoc = resolvePreset(val, dirname);
+        if (typeof preset === "string") {
+          presetLoc = resolvePreset(preset, dirname);
 
           if (!presetLoc) {
-            throw new Error(`Couldn't find preset ${JSON.stringify(val)} relative to directory ` +
+            throw new Error(`Couldn't find preset ${JSON.stringify(preset)} relative to directory ` +
               JSON.stringify(dirname));
           }
-
-          val = require(presetLoc);
         }
+        const presetFactory = this.getPresetFactoryForPreset(presetLoc || preset);
 
-        // If the imported preset is a transpiled ES2015 module
-        if (typeof val === "object" && val.__esModule) {
-          // Try to grab the default export.
-          if (val.default) {
-            val = val.default;
-          } else {
-            // If there is no default export we treat all named exports as options
-            // and just remove the __esModule. This is to support presets that have been
-            // exporting named exports in the past, although we definitely want presets to
-            // only use the default export (with either an object or a function)
-            const { __esModule, ...rest } = val; // eslint-disable-line no-unused-vars
-            val = rest;
-          }
-        }
+        preset = presetFactory(context, options);
 
-        // For compatibility with babel-core < 6.13.x, allow presets to export an object with a
-        // a 'buildPreset' function that will return the preset itself, while still exporting a
-        // simple object (rather than a function), for supporting old Babel versions.
-        if (typeof val === "object" && val.buildPreset) val = val.buildPreset;
-
-
-        if (typeof val !== "function" && options !== undefined) {
-          throw new Error(`Options ${JSON.stringify(options)} passed to ` +
-            (presetLoc || "a preset") + " which does not accept options.");
-        }
-
-        if (typeof val === "function") val = val(context, options);
-
-        if (typeof val !== "object") {
-          throw new Error(`Unsupported preset format: ${val}.`);
-        }
-
-        onResolve && onResolve(val, presetLoc);
+        if (onResolve) onResolve(preset, presetLoc);
       } catch (e) {
         if (presetLoc) {
           e.message += ` (While processing preset: ${JSON.stringify(presetLoc)})`;
         }
         throw e;
       }
-      return val;
+
+      return preset;
     });
   }
 
+  getPresetFactoryForPreset(preset) {
+    let presetFactory = preset;
+    if (typeof presetFactory === "string") {
+      presetFactory = require(presetFactory);
+    }
+
+    // If the imported preset is a transpiled ES2015 module
+    if (typeof presetFactory === "object" && presetFactory.__esModule) {
+      if (presetFactory.default) {
+        presetFactory = presetFactory.default;
+      } else {
+        throw new Error("Preset must export a default export when using ES6 modules.");
+      }
+    }
+
+    if (typeof presetFactory !== "function") {
+      // eslint-disable-next-line max-len
+      throw new Error(`Unsupported preset format: ${typeof presetFactory}. Expected preset to return a function.`);
+    }
+
+    return presetFactory;
+  }
+
   normaliseOptions() {
     const opts = this.options;
 
diff --git a/packages/babel-core/test/api.js b/packages/babel-core/test/api.js
index 7cd5157afe..8344bacd54 100644
--- a/packages/babel-core/test/api.js
+++ b/packages/babel-core/test/api.js
@@ -194,38 +194,42 @@ describe("api", function () {
         passPerPreset: passPerPreset,
         presets: [
           // First preset with our plugin, "before"
-          {
-            plugins: [
-              new Plugin({
-                visitor: {
-                  Function: function(path) {
-                    const alias = path.scope.getProgramParent().path.get("body")[0].node;
-                    if (!babel.types.isTypeAlias(alias)) return;
+          function () {
+            return {
+              plugins: [
+                new Plugin({
+                  visitor: {
+                    Function: function (path) {
+                      const alias = path.scope.getProgramParent().path.get("body")[0].node;
+                      if (!babel.types.isTypeAlias(alias)) return;
 
-                    // In case of `passPerPreset` being `false`, the
-                    // alias node is already removed by Flow plugin.
-                    if (!alias) {
-                      return;
+                      // In case of `passPerPreset` being `false`, the
+                      // alias node is already removed by Flow plugin.
+                      if (!alias) {
+                        return;
+                      }
+
+                      // In case of `passPerPreset` being `true`, the
+                      // alias node should still exist.
+                      aliasBaseType = alias.right.type; // NumberTypeAnnotation
                     }
-
-                    // In case of `passPerPreset` being `true`, the
-                    // alias node should still exist.
-                    aliasBaseType = alias.right.type; // NumberTypeAnnotation
                   }
-                }
-              })
-            ]
+                })
+              ]
+            };
           },
 
           // ES2015 preset
           require(__dirname + "/../../babel-preset-es2015"),
 
           // Third preset for Flow.
-          {
-            plugins: [
-              require(__dirname + "/../../babel-plugin-syntax-flow"),
-              require(__dirname + "/../../babel-plugin-transform-flow-strip-types"),
-            ]
+          function () {
+            return {
+              plugins: [
+                require(__dirname + "/../../babel-plugin-syntax-flow"),
+                require(__dirname + "/../../babel-plugin-transform-flow-strip-types"),
+              ]
+            };
           }
         ],
       });
diff --git a/packages/babel-core/test/fixtures/option-manager/not-a-preset.js b/packages/babel-core/test/fixtures/option-manager/not-a-preset.js
index 7059dfdbe3..67e7ffccf5 100644
--- a/packages/babel-core/test/fixtures/option-manager/not-a-preset.js
+++ b/packages/babel-core/test/fixtures/option-manager/not-a-preset.js
@@ -1,3 +1,3 @@
 module.exports = function () {
   throw new Error('Not a real preset');
-}
+};
diff --git a/packages/babel-core/test/fixtures/option-manager/presets/es2015_default_object_function.js b/packages/babel-core/test/fixtures/option-manager/presets/es2015_default_object_function.js
deleted file mode 100644
index b5f1eef249..0000000000
--- a/packages/babel-core/test/fixtures/option-manager/presets/es2015_default_object_function.js
+++ /dev/null
@@ -1,18 +0,0 @@
-// from code:
-// export default {
-//   buildPreset: function() {
-//     return {
-//       plugins: [require('../../../../../babel-plugin-syntax-decorators'),]
-//     };
-//   }
-// }
-'use strict';
-
-exports.__esModule = true;
-exports.default = {
-  buildPreset: function buildPreset() {
-    return {
-      plugins: [require('../../../../../babel-plugin-syntax-decorators')]
-    };
-  }
-};
diff --git a/packages/babel-core/test/fixtures/option-manager/presets/es2015_function.js b/packages/babel-core/test/fixtures/option-manager/presets/es2015_function.js
deleted file mode 100644
index eddcf7e294..0000000000
--- a/packages/babel-core/test/fixtures/option-manager/presets/es2015_function.js
+++ /dev/null
@@ -1,17 +0,0 @@
-// from code:
-// export const buildPreset = function() {
-//   return {
-//     plugins: [require('../../../../../babel-plugin-syntax-decorators'),]
-//   };
-// }
-'use strict';
-
-Object.defineProperty(exports, "__esModule", {
-  value: true
-});
-
-var buildPreset = exports.buildPreset = function buildPreset() {
-  return {
-    plugins: [require('../../../../../babel-plugin-syntax-decorators')]
-  };
-};
diff --git a/packages/babel-core/test/fixtures/option-manager/presets/es2015_function_fallback.js b/packages/babel-core/test/fixtures/option-manager/presets/es2015_function_fallback.js
deleted file mode 100644
index d0c11d0258..0000000000
--- a/packages/babel-core/test/fixtures/option-manager/presets/es2015_function_fallback.js
+++ /dev/null
@@ -1,50 +0,0 @@
-// from code:
-// function preset() {
-//   return {
-//     plugins: [
-//       require('../../../../../babel-plugin-syntax-decorators'),
-//     ]
-//   };
-// }
-//
-// const oldConfig = preset();
-//
-// export default oldConfig;
-//
-// // However, for backward compatibility with babel-core < v6.13.x, we use the 'buildPreset'
-// // property of the preset object for the preset creation function with the enumerability
-// // caveat mentioned below.
-// Object.defineProperty(oldConfig, "buildPreset", {
-//   configurable: true,
-//   writable: true,
-//   // We make this non-enumerable so old versions of babel-core won't see it as an unknown property,
-//   // while allowing new versions to see it as a preset builder function.
-//   enumerable: false,
-//   value: preset,
-// });
-//
-
-"use strict";
-
-exports.__esModule = true;
-function preset() {
-  return {
-    plugins: [require('../../../../../babel-plugin-syntax-decorators')]
-  };
-}
-
-var oldConfig = preset();
-
-exports.default = oldConfig;
-
-// However, for backward compatibility with babel-core < v6.13.x, we use the 'buildPreset'
-// property of the preset object for the preset creation function with the enumerability
-// caveat mentioned below.
-Object.defineProperty(oldConfig, "buildPreset", {
-  configurable: true,
-  writable: true,
-  // We make this non-enumerable so old versions of babel-core won't see it as an unknown property,
-  // while allowing new versions to see it as a preset builder function.
-  enumerable: false,
-  value: preset
-});
diff --git a/packages/babel-core/test/fixtures/option-manager/presets/es5_function.js b/packages/babel-core/test/fixtures/option-manager/presets/es5_function.js
index 31648d0600..71c789f9df 100644
--- a/packages/babel-core/test/fixtures/option-manager/presets/es5_function.js
+++ b/packages/babel-core/test/fixtures/option-manager/presets/es5_function.js
@@ -1,9 +1,7 @@
-module.exports = {
-  buildPreset: function () {
-    return {
-      plugins: [
-        require('../../../../../babel-plugin-syntax-decorators'),
-      ]
-    };
-  }
+module.exports = function () {
+  return {
+    plugins: [
+      require('../../../../../babel-plugin-syntax-decorators'),
+    ]
+  };
 };
diff --git a/packages/babel-core/test/fixtures/option-manager/presets/es5_invalid.js b/packages/babel-core/test/fixtures/option-manager/presets/es5_invalid.js
new file mode 100644
index 0000000000..258dbaf2cc
--- /dev/null
+++ b/packages/babel-core/test/fixtures/option-manager/presets/es5_invalid.js
@@ -0,0 +1,2 @@
+'use strict';
+module.exports = "invalid";
diff --git a/packages/babel-core/test/fixtures/resolution/resolve-addons-relative-to-file/node_modules/addons/preset.js b/packages/babel-core/test/fixtures/resolution/resolve-addons-relative-to-file/node_modules/addons/preset.js
index a1af16e41f..b2f7d13c73 100644
--- a/packages/babel-core/test/fixtures/resolution/resolve-addons-relative-to-file/node_modules/addons/preset.js
+++ b/packages/babel-core/test/fixtures/resolution/resolve-addons-relative-to-file/node_modules/addons/preset.js
@@ -1,5 +1,7 @@
-module.exports = {
-  plugins: [plugin],
+module.exports = function () {
+  return {
+    plugins: [plugin],
+  }
 };
 
 function plugin () {
diff --git a/packages/babel-core/test/option-manager.js b/packages/babel-core/test/option-manager.js
index 2ca432dd20..582b61d8be 100644
--- a/packages/babel-core/test/option-manager.js
+++ b/packages/babel-core/test/option-manager.js
@@ -51,19 +51,6 @@ describe("option-manager", () => {
         /While processing preset: .*option-manager(?:\/|\\\\)not-a-preset\.js/
       );
     });
-
-    it("throws for invalid preset configuration", function() {
-      return assert.throws(
-        function () {
-          const opt = new OptionManager(new Logger(null, "unknown"));
-          opt.init({
-            "presets": [{ option: "value" }]
-          });
-        },
-        // eslint-disable-next-line max-len
-        /Unknown option: foreign.option\.(?:.|\n)+A common cause of this error is the presence of a configuration options object without the corresponding preset name/
-      );
-    });
   });
 
   describe("presets", function () {
@@ -79,14 +66,21 @@ describe("option-manager", () => {
       });
     }
 
-    presetTest("es5");
-    presetTest("es5_function");
-    presetTest("es2015_default");
-    presetTest("es2015_default_function");
-    presetTest("es2015_default_object_function");
-    presetTest("es2015_function");
-    presetTest("es2015_function_fallback");
-    presetTest("es2015_named");
+    function presetThrowsTest(name, msg) {
+      it(name, function () {
+        const opt = new OptionManager(new Logger(null, "unknown"));
+        assert.throws(() => opt.init({
+          "presets": [path.join(__dirname, "fixtures/option-manager/presets", name)]
+        }), msg);
+      });
+    }
 
+    presetTest("es5_function");
+    presetTest("es2015_default_function");
+
+    presetThrowsTest("es5", /Expected preset to return a function./);
+    presetThrowsTest("es2015_default", /Expected preset to return a function./);
+    presetThrowsTest("es2015_named", /Preset must export a default export when using ES6 modules/);
+    presetThrowsTest("es5_invalid", /Unsupported preset format: string/);
   });
 });
diff --git a/packages/babel-preset-es2015/src/index.js b/packages/babel-preset-es2015/src/index.js
index 57d96082d1..dcff99017a 100644
--- a/packages/babel-preset-es2015/src/index.js
+++ b/packages/babel-preset-es2015/src/index.js
@@ -1,11 +1,3 @@
-/**
- * This file is not the canonical way of writing a Babel preset since it strives for
- * backward compatibility with babel-core < v6.13.x.  If you're looking at it as a
- * reference for how to write a preset, it's probably best to look at the other presets
- * such as babel-preset-es2016 & babel-preset-latest noting that the former example
- * exports via a default object and the latter via a default function.
- */
-
 import transformES2015TemplateLiterals from "babel-plugin-transform-es2015-template-literals";
 import transformES2015Literals from "babel-plugin-transform-es2015-literals";
 import transformES2015FunctionName from "babel-plugin-transform-es2015-function-name";
@@ -31,7 +23,7 @@ import transformES2015ModulesAMD from "babel-plugin-transform-es2015-modules-amd
 import transformES2015ModulesUMD from "babel-plugin-transform-es2015-modules-umd";
 import transformRegenerator from "babel-plugin-transform-regenerator";
 
-function preset(context, opts = {}) {
+export default function (context, opts = {}) {
   const moduleTypes = ["commonjs", "amd", "umd", "systemjs"];
   let loose = false;
   let modules = "commonjs";
@@ -82,24 +74,3 @@ function preset(context, opts = {}) {
     ].filter(Boolean) // filter out falsy values
   };
 }
-
-/**
- * This preset was originally an object, before function-based configurable presets were introduced.
- * For backward-compatibility with anything that may have been loading this preset and expecting
- * it to be a simple Babel config object, we export the old config here via default object.
- */
-const oldConfig = preset({});
-
-export default oldConfig;
-
-// However, for backward compatibility with babel-core < v6.13.x, we use the 'buildPreset'
-// property of the preset object for the preset creation function with the enumerability
-// caveat mentioned below.
-Object.defineProperty(oldConfig, "buildPreset", {
-  configurable: true,
-  writable: true,
-  // We make this non-enumerable so old versions of babel-core won't see it as an unknown property,
-  // while allowing new versions to see it as a preset builder function.
-  enumerable: false,
-  value: preset,
-});
diff --git a/packages/babel-preset-es2015/test/index.js b/packages/babel-preset-es2015/test/index.js
index b7847d1b83..99ac458986 100644
--- a/packages/babel-preset-es2015/test/index.js
+++ b/packages/babel-preset-es2015/test/index.js
@@ -2,18 +2,10 @@ import es2015 from "../lib";
 import { expect } from "chai";
 
 describe("es2015 preset", function () {
-  it("exposes an object", function () {
-    // Changing this will break compatibility with babel-core < 6.13.x.
-    expect(typeof es2015).to.equal("object");
-  });
-
-  it("exposes a separate list of plugins", function () {
-    expect(Array.isArray(es2015.plugins)).to.equal(true);
-  });
 
   it("doesn't throw with no options passed", function () {
     expect(function () {
-      es2015.buildPreset(null);
+      es2015(null);
     }).not.to.throw();
   });
 
@@ -21,7 +13,7 @@ describe("es2015 preset", function () {
     describe("loose", function () {
       it("throws on non-boolean value", function () {
         expect(function () {
-          es2015.buildPreset(null, { loose: 1 });
+          es2015(null, { loose: 1 });
         }).to.throw(/must be a boolean/);
       });
     });
@@ -29,25 +21,25 @@ describe("es2015 preset", function () {
     describe("modules", function () {
       it("doesn't throw when passing one false", function () {
         expect(function () {
-          es2015.buildPreset(null, { modules: false });
+          es2015(null, { modules: false });
         }).not.to.throw();
       });
 
       it("doesn't throw when passing one of: 'commonjs', 'amd', 'umd', 'systemjs", function () {
         expect(function () {
-          es2015.buildPreset(null, { modules: "commonjs" });
+          es2015(null, { modules: "commonjs" });
         }).not.to.throw();
 
         expect(function () {
-          es2015.buildPreset(null, { modules: "amd" });
+          es2015(null, { modules: "amd" });
         }).not.to.throw();
 
         expect(function () {
-          es2015.buildPreset(null, { modules: "umd" });
+          es2015(null, { modules: "umd" });
         }).not.to.throw();
 
         expect(function () {
-          es2015.buildPreset(null, { modules: "systemjs" });
+          es2015(null, { modules: "systemjs" });
         }).not.to.throw();
       });
     });
diff --git a/packages/babel-preset-es2016/src/index.js b/packages/babel-preset-es2016/src/index.js
index 3ce3c75985..e0857e59c2 100644
--- a/packages/babel-preset-es2016/src/index.js
+++ b/packages/babel-preset-es2016/src/index.js
@@ -1,7 +1,9 @@
 import transformExponentiationOperator from "babel-plugin-transform-exponentiation-operator";
 
-export default {
-  plugins: [
-    transformExponentiationOperator
-  ]
-};
+export default function () {
+  return {
+    plugins: [
+      transformExponentiationOperator
+    ]
+  };
+}
diff --git a/packages/babel-preset-es2017/src/index.js b/packages/babel-preset-es2017/src/index.js
index 8c83b453c2..599186b002 100644
--- a/packages/babel-preset-es2017/src/index.js
+++ b/packages/babel-preset-es2017/src/index.js
@@ -1,9 +1,11 @@
 import syntaxTrailingFunctionCommas from "babel-plugin-syntax-trailing-function-commas";
 import transformAsyncToGenerator from "babel-plugin-transform-async-to-generator";
 
-export default {
-  plugins: [
-    syntaxTrailingFunctionCommas,
-    transformAsyncToGenerator
-  ]
-};
+export default function () {
+  return {
+    plugins: [
+      syntaxTrailingFunctionCommas,
+      transformAsyncToGenerator
+    ]
+  };
+}
diff --git a/packages/babel-preset-flow/src/index.js b/packages/babel-preset-flow/src/index.js
index 8251ca8270..ef847d5f57 100644
--- a/packages/babel-preset-flow/src/index.js
+++ b/packages/babel-preset-flow/src/index.js
@@ -1,7 +1,9 @@
 import transformFlowStripTypes from "babel-plugin-transform-flow-strip-types";
 
-export default {
-  plugins: [
-    transformFlowStripTypes
-  ]
-};
+export default function () {
+  return {
+    plugins: [
+      transformFlowStripTypes
+    ]
+  };
+}
diff --git a/packages/babel-preset-latest/src/index.js b/packages/babel-preset-latest/src/index.js
index 8571beea98..5469c2146d 100644
--- a/packages/babel-preset-latest/src/index.js
+++ b/packages/babel-preset-latest/src/index.js
@@ -2,13 +2,10 @@ import presetES2015 from "babel-preset-es2015";
 import presetES2016 from "babel-preset-es2016";
 import presetES2017 from "babel-preset-es2017";
 
-// Rather than exporting a default object to represent the preset, we can
-// also export a default function instead, as this preset demonstrates.
-// This allows one to further configure a preset by way of specific options.
 export default function (context, opts = {}) {
   return {
     presets: [
-      opts.es2015 !== false && [presetES2015.buildPreset, opts.es2015],
+      opts.es2015 !== false && [presetES2015, opts.es2015],
       opts.es2016 !== false && presetES2016,
       opts.es2017 !== false && presetES2017
     ].filter(Boolean) // filter out falsy values
diff --git a/packages/babel-preset-react/src/index.js b/packages/babel-preset-react/src/index.js
index 361238658e..7f30145f70 100644
--- a/packages/babel-preset-react/src/index.js
+++ b/packages/babel-preset-react/src/index.js
@@ -7,21 +7,23 @@ import transformReactDisplayName from "babel-plugin-transform-react-display-name
 // import transformReactJSXSource from "babel-plugin-transform-react-jsx-source";
 // import transformReactJSXSelf from "babel-plugin-transform-react-jsx-self";
 
-export default {
-  presets: [
-    presetFlow
-  ],
-  plugins: [
-    transformReactJSX,
-    transformSyntaxJSX,
-    transformReactDisplayName
-  ],
-  env: {
-    development: {
-      plugins: [
-        // transformReactJSXSource,
-        // transformReactJSXSelf
-      ]
+export default function () {
+  return {
+    presets: [
+      presetFlow
+    ],
+    plugins: [
+      transformReactJSX,
+      transformSyntaxJSX,
+      transformReactDisplayName
+    ],
+    env: {
+      development: {
+        plugins: [
+          // transformReactJSXSource,
+          // transformReactJSXSelf
+        ]
+      }
     }
-  }
-};
+  };
+}
diff --git a/packages/babel-preset-stage-0/src/index.js b/packages/babel-preset-stage-0/src/index.js
index b9b65f10a0..f134ea884c 100644
--- a/packages/babel-preset-stage-0/src/index.js
+++ b/packages/babel-preset-stage-0/src/index.js
@@ -3,12 +3,14 @@ import presetStage1 from "babel-preset-stage-1";
 import transformDoExpressions from "babel-plugin-transform-do-expressions";
 import transformFunctionBind from "babel-plugin-transform-function-bind";
 
-export default {
-  presets: [
-    presetStage1
-  ],
-  plugins: [
-    transformDoExpressions,
-    transformFunctionBind
-  ]
-};
+export default function () {
+  return {
+    presets: [
+      presetStage1
+    ],
+    plugins: [
+      transformDoExpressions,
+      transformFunctionBind
+    ]
+  };
+}
diff --git a/packages/babel-preset-stage-1/src/index.js b/packages/babel-preset-stage-1/src/index.js
index 11ed6e011c..9ab261e3c9 100644
--- a/packages/babel-preset-stage-1/src/index.js
+++ b/packages/babel-preset-stage-1/src/index.js
@@ -3,12 +3,14 @@ import presetStage2 from "babel-preset-stage-2";
 import transformDecorators from "babel-plugin-transform-decorators";
 import transformExportExtensions from "babel-plugin-transform-export-extensions";
 
-export default {
-  presets: [
-    presetStage2
-  ],
-  plugins: [
-    transformDecorators,
-    transformExportExtensions
-  ]
-};
+export default function () {
+  return {
+    presets: [
+      presetStage2
+    ],
+    plugins: [
+      transformDecorators,
+      transformExportExtensions
+    ]
+  };
+}
diff --git a/packages/babel-preset-stage-2/src/index.js b/packages/babel-preset-stage-2/src/index.js
index efdd6ac729..9f251fc38c 100644
--- a/packages/babel-preset-stage-2/src/index.js
+++ b/packages/babel-preset-stage-2/src/index.js
@@ -4,13 +4,15 @@ import syntaxDynamicImport from "babel-plugin-syntax-dynamic-import";
 import transformClassProperties from "babel-plugin-transform-class-properties";
 import transformUnicodePropertyRegex from "babel-plugin-transform-unicode-property-regex";
 
-export default {
-  presets: [
-    presetStage3
-  ],
-  plugins: [
-    syntaxDynamicImport,
-    transformClassProperties,
-    transformUnicodePropertyRegex
-  ]
-};
+export default function () {
+  return {
+    presets: [
+      presetStage3
+    ],
+    plugins: [
+      syntaxDynamicImport,
+      transformClassProperties,
+      transformUnicodePropertyRegex
+    ]
+  };
+}
diff --git a/packages/babel-preset-stage-3/src/index.js b/packages/babel-preset-stage-3/src/index.js
index dd6e2edbe9..20c6c49393 100644
--- a/packages/babel-preset-stage-3/src/index.js
+++ b/packages/babel-preset-stage-3/src/index.js
@@ -1,9 +1,11 @@
 import transformObjectRestSpread from "babel-plugin-transform-object-rest-spread";
 import transformAsyncGeneratorFunctions from "babel-plugin-transform-async-generator-functions";
 
-export default {
-  plugins: [
-    transformAsyncGeneratorFunctions,
-    transformObjectRestSpread
-  ]
-};
+export default function () {
+  return {
+    plugins: [
+      transformAsyncGeneratorFunctions,
+      transformObjectRestSpread
+    ]
+  };
+}