diff --git a/.babelrc b/.babelrc
index 3f89d16..db84814 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,5 +1,4 @@
 {
-  "presets": ["@babel/preset-env"],
   "plugins": [
     "@babel/plugin-proposal-class-properties"
   ]
diff --git a/.gitignore b/.gitignore
index 5cdf045..429fa15 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+/pkg
 /dist
 /node_modules
 /yarn.lock
diff --git a/index.js b/index.js
deleted file mode 100644
index 11fe17f..0000000
--- a/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export { default } from "./src/union";
\ No newline at end of file
diff --git a/package.json b/package.json
index fd5401e..826d31b 100644
--- a/package.json
+++ b/package.json
@@ -6,33 +6,46 @@
   "author": "Charles Lowell <cowboyd@frontside.io>",
   "license": "MIT",
   "private": false,
-  "main": "dist/microtates-union.cjs.js",
-  "module": "dist/microtates-union.es.js",
-  "unpkg": "dist/microtates-union.umd.js",
-  "browser": "dist/microtates-union.umd.js",
   "scripts": {
     "test": "mocha --recursive -r tests/setup tests",
-    "build": "rollup -c",
-    "prepare": "npm run build",
-    "prerelease": "npm test && npm run build"
+    "build": "pack build",
+    "prepare": "yarn build",
+    "publish": "pack publish",
+    "prepublishOnly": "yarn test && yarn build"
   },
   "devDependencies": {
     "@babel/core": "^7.1.6",
     "@babel/plugin-proposal-class-properties": "^7.1.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/register": "^7.0.0",
+    "@pika/pack": "^0.3.5",
+    "@pika/plugin-build-node": "^0.3.14",
+    "@pika/plugin-build-web": "^0.3.14",
+    "@pika/plugin-standard-pkg": "0.3.14",
     "babel-eslint": "^10.0.1",
     "expect": "^24.1.0",
-    "mocha": "^5.2.0",
-    "rollup": "^1.0.0",
-    "rollup-plugin-babel": "4.3.1",
-    "rollup-plugin-commonjs": "9.2.0",
-    "rollup-plugin-filesize": "6.0.0",
-    "rollup-plugin-node-resolve": "4.0.0",
-    "rollup-plugin-replace": "2.1.0",
-    "microstates": "^0.13.0"
+    "microstates": "^0.13.0",
+    "mocha": "^5.2.0"
   },
   "peerDependencies": {
     "microstates": "^0.13.0"
+  },
+  "@pika/pack": {
+    "pipeline": [
+      [
+        "@pika/plugin-standard-pkg",
+        {
+          "exclude": [
+            "__tests__/**/*"
+          ]
+        }
+      ],
+      [
+        "@pika/plugin-build-node"
+      ],
+      [
+        "@pika/plugin-build-web"
+      ]
+    ]
   }
 }
diff --git a/rollup.config.js b/rollup.config.js
deleted file mode 100644
index a6b9dfd..0000000
--- a/rollup.config.js
+++ /dev/null
@@ -1,109 +0,0 @@
-const pkg = require("./package.json");
-const babel = require("rollup-plugin-babel");
-const filesize = require("rollup-plugin-filesize");
-const resolve = require("rollup-plugin-node-resolve");
-const commonjs = require('rollup-plugin-commonjs');
-const replace = require('rollup-plugin-replace');
-
-const external = [
-  "microstates"
-];
-
-const globals = {
-  "microstates": "Microstates"
-}
-
-const babelPlugin = babel({
-  babelrc: false,
-  comments: false,
-  plugins: ["@babel/plugin-proposal-class-properties"],
-  presets: [
-    [
-      "@babel/preset-env",
-      {
-        modules: false
-      }
-    ]
-  ]
-});
-
-const fileSize = filesize();
-
-module.exports = [
-  {
-    input: "index.js",
-    output: {
-      name: 'MicrostatesUnion',
-      file: pkg.unpkg,
-      format: "umd",
-      globals
-    },
-    external,
-    plugins: [
-      replace({
-        "process.env.NODE_ENV": JSON.stringify('production')
-      }),
-      resolve({
-        module: false,
-        main: true
-      }),
-      babel({
-        babelrc: false,
-        comments: false,
-        plugins: ["@babel/plugin-proposal-class-properties"],
-        presets: [
-          [
-            "@babel/preset-env",
-            {
-              targets: {
-                chrome: "58",
-              },
-              modules: false
-            }
-          ]
-        ]
-      }),
-      commonjs(),
-      fileSize
-    ]
-  },
-  {
-    input: "index.js",
-    external,
-    output: {
-      file: pkg.main,
-      format: "cjs",
-      sourcemap: true
-    },
-    plugins: [
-      resolve(),
-      babel({
-        babelrc: false,
-        comments: false,
-        plugins: ["@babel/plugin-proposal-class-properties"],
-        presets: [
-          [
-            "@babel/preset-env",
-            {
-              targets: {
-                node: "6"
-              },
-              modules: false
-            }
-          ]
-        ]
-      }),
-      fileSize
-    ]
-  },
-  {
-    input: "index.js",
-    external,
-    output: { file: pkg.module, format: "es", sourcemap: true },
-    plugins: [
-      resolve(),
-      babelPlugin,
-      fileSize
-    ]
-  }
-];
\ No newline at end of file
diff --git a/src/union.js b/src/index.js
similarity index 97%
rename from src/union.js
rename to src/index.js
index 6d5298d..bc83102 100644
--- a/src/union.js
+++ b/src/index.js
@@ -1,6 +1,4 @@
-import * as M from 'microstates';
-
-const { create, valueOf } = M;
+import { create, valueOf } from 'microstates';
 
 export default function Union(members, Base = class {}) {
   let types = Object.keys(members);
diff --git a/tests/index.test.js b/tests/index.test.js
deleted file mode 100644
index a80177c..0000000
--- a/tests/index.test.js
+++ /dev/null
@@ -1,9 +0,0 @@
-import Union from '../index';
-
-import expect from 'expect';
-
-describe('index.js', ()=> {
-  it('has the Union function as its default export', ()=> {
-    expect(Union).toBeInstanceOf(Function);
-  });
-});
diff --git a/tests/setup b/tests/setup
index bdf5681..fdeaf4f 100644
--- a/tests/setup
+++ b/tests/setup
@@ -4,6 +4,7 @@ require("@babel/register")({
   // This will override `node_modules` ignoring - you can alternatively pass
   // an array of strings to be explicitly matched or a regex / glob
   ignore: ['node_modules/*'],
+  presets: ['@babel/preset-env'],
   plugins: [
     '@babel/plugin-proposal-class-properties'
   ]
diff --git a/tests/union.test.js b/tests/union.test.js
index 3cdaa7f..158b0a1 100644
--- a/tests/union.test.js
+++ b/tests/union.test.js
@@ -1,6 +1,6 @@
 import expect from 'expect';
 
-import Union from '../src/union';
+import Union from '../src';
 import { create } from 'microstates';
 
 describe('Using a union type to construct a Maybe value', ()=> {