diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..85de9cf
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1 @@
+src
diff --git a/dist/index.js b/dist/index.js
new file mode 100644
index 0000000..fc1da66
--- /dev/null
+++ b/dist/index.js
@@ -0,0 +1,146 @@
+'use strict';
+
+var R = require('ramda');
+var is = require('is_js');
+
+var Ru = R.map(R.curry, {
+	applyTo: function applyTo(obj, fn) {
+		return fn(obj);
+	},
+	compareProps: function compareProps(props, a, b) {
+		// determine property compare function (lt or gt) based on + or -
+		var propCompares = R.map(function (prop) {
+			return prop[0] == '-' ? R.gt : R.lt;
+		}, props);
+		// remove + and - from property names
+		props = R.map(R.replace(/^(-|\+)/, ''), props);
+		// determine which properties are equal
+		var equalProps = R.map(function (prop) {
+			return R.equals(a[prop], b[prop]);
+		}, props);
+		// find first non-equal property
+		var index = R.findIndex(R.equals(false), equalProps);
+		// if found then compare that property
+		if (index >= 0) return R.comparator(propCompares[index])(a[props[index]], b[props[index]]);
+		// return all properties equal
+		return 0;
+	},
+	complementC: function complementC(fn) {
+		return R.curry(R.nAry(fn.length, function () {
+			return !fn.apply(this, arguments);
+		}));
+	},
+	defaults: function defaults(def, obj) {
+		return R.merge(def, Ru.filterObj(R.complement(is.undefined), obj));
+	},
+	defaultsR: function defaultsR(def, obj) {
+		return Ru.mergeR(def, Ru.filterObjR(R.complement(is.undefined), obj));
+	},
+	mergeR: function mergeR(a, b) {
+		var obj = R.clone(a);
+		R.forEach(function (key) {
+			return obj[key] = is.json(obj[key]) && is.json(b[key]) ? Ru.mergeR(obj[key] || {}, b[key]) : b[key];
+		}, R.keys(b));
+		return obj;
+	},
+	filterObj: function filterObj(pred, obj) {
+		return R.pick(R.filter(function (key) {
+			return pred(obj[key]);
+		}, R.keys(obj)), obj);
+	},
+	filterObjR: function filterObjR(pred, obj) {
+		return R.map(function (v) {
+			return is.json(v) ? Ru.filterObjR(pred, v) : v;
+		}, Ru.filterObj(R.anyPass([is.json, pred]), obj));
+	},
+	isEmptyC: function isEmptyC(fn) {
+		return R.curry(R.nAry(fn.length, function () {
+			return R.isEmpty(fn.apply(this, arguments));
+		}));
+	},
+	isNotEmptyC: function isNotEmptyC(fn) {
+		return R.curry(R.nAry(fn.length, function () {
+			return !R.isEmpty(fn.apply(this, arguments));
+		}));
+	},
+	matchGroups: function matchGroups(reg, str) {
+		var m,
+		    g = [];
+		// avoid infinite loop
+		if (!reg.global) {
+			var match = reg.exec(str);
+			if (match) g.push(match.slice(1));
+		} else {
+			var previousIndex = -1;
+			while ((m = reg.exec(str)) && previousIndex != m.index) {
+				g.push(m.slice(1));
+				previousIndex = m.index;
+			}
+		}
+		return g;
+	},
+	pickValues: function pickValues(keys, obj) {
+		return R.compose(R.values, R.pick(keys))(obj);
+	},
+	rmap: function rmap(obj, fns) {
+		return R.map(Ru.applyTo(obj), fns);
+	},
+	sumProps: function sumProps(keys, obj) {
+		return R.sum(Ru.pickValues(keys, obj));
+	},
+	sumColumn: function sumColumn(key, objs) {
+		return R.sum(R.map(R.prop(key), objs));
+	},
+	subsetOf: function subsetOf(set, sub) {
+		return R.reduce(R.and, true, R.map(R.contains(R.__, set), sub));
+	},
+	toNumber: function toNumber(x) {
+		return Number(x);
+	},
+	toString: function toString(x) {
+		return String(x);
+	},
+	toDate: function toDate(x) {
+		return new Date(x);
+	},
+	trace: function trace(msg, x) {
+		console.log(msg, x);return x;
+	},
+	zipApply: function zipApply(fns, objs) {
+		return R.zipWith(R.call, fns, objs);
+	},
+	substring: function substring(start, end, str) {
+		return str.substring(start, end || undefined);
+	},
+	pathCommon: function pathCommon(delimiter, path, obj) {
+		return R.path(R.split(delimiter, path))(obj);
+	}
+});
+
+Ru = R.merge(Ru, R.map(R.curry, {
+	createIndexOpts: function createIndexOpts(options, keys, objs) {
+		options = R.merge({
+			unique: false,
+			keyDelimiter: '|'
+		}, options || {});
+		return R.reduce(function (objIndex, obj) {
+			var indexKey = Ru.pickValues(keys, obj).join(options.keyDelimiter);
+			// create empty entry
+			if (!objIndex[indexKey]) objIndex[indexKey] = [];else if (options.unique) throw new Error('Cannot build unique index (index key: ' + indexKey + ')');
+			// add to existing entry
+			objIndex[indexKey].push(obj);
+			return objIndex;
+		}, {}, objs);
+	}
+}));
+
+Ru = R.merge(Ru, {
+	mergeAllR: function mergeAllR(a) {
+		return R.reduce(Ru.mergeR, {}, a);
+	},
+	path: Ru.pathCommon('.')
+});
+
+Ru.createIndex = Ru.createIndexOpts(null);
+
+module.exports = Ru;
\ No newline at end of file
diff --git a/package.json b/package.json
index bad7e24..395e885 100644
--- a/package.json
+++ b/package.json
@@ -3,11 +3,13 @@
   "version": "0.2.8",
   "description": "Utilities built on top of Ramda.",
   "repository": "panosoft/ramda-utils",
-  "main": "lib/index.js",
+  "main": "dist/index.js",
   "scripts": {
     "test": "mocha",
     "patch": "npm version patch && git push --follow-tags && npm publish",
-    "minor": "npm version minor && git push --follow-tags && npm publish"
+    "minor": "npm version minor && git push --follow-tags && npm publish",
+    "build": "babel src --presets babel-preset-es2015 --out-dir dist",
+    "prepublish": "npm run build"
   },
   "author": "Charles Scalfani",
   "license": "MIT",
@@ -16,6 +18,8 @@
     "ramda": "^0.18.0"
   },
   "devDependencies": {
+    "babel-cli": "^6.24.1",
+    "babel-preset-es2015": "^6.24.1",
     "chai": "^3.2.0",
     "mocha": "^2.3.2",
     "sinon": "^1.16.1",
diff --git a/lib/index.js b/src/index.js
similarity index 100%
rename from lib/index.js
rename to src/index.js
diff --git a/test/index.js b/test/index.js
index 2c8d429..17f5101 100644
--- a/test/index.js
+++ b/test/index.js
@@ -3,7 +3,7 @@ var expect = require('chai')
 	.expect;
 var assert = require('chai').assert;
 var R = require('ramda');
-var Ru = require('../lib');
+var Ru = require('../src');
 var sinon = require('sinon');
 
 describe('applyTo', function () {