Use Rollup.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "d3-scale",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "description": "Encodings that map abstract data to visual representation.",
   "keywords": [
     "d3",
@@ -13,28 +13,28 @@
     "name": "Mike Bostock",
     "url": "http://bost.ocks.org/mike"
   },
-  "main": "build/scale.cjs",
+  "main": "build/d3-scale.js",
   "jsnext:main": "index",
   "repository": {
     "type": "git",
     "url": "https://github.com/d3/d3-scale.git"
   },
   "scripts": {
-    "pretest": "mkdir -p build && d3-bundler -x -f cjs -o build/scale.cjs.js",
+    "pretest": "mkdir -p build && node -e 'process.stdout.write(\"var version = \\\"\" + require(\"./package.json\").version + \"\\\"; export * from \\\"../index\\\"; export {version};\");' > build/bundle.js && rollup -f umd -g d3-arrays:d3_arrays,d3-color:d3_color,d3-format:d3_format,d3-interpolate:d3_interpolate,d3-time:d3_time,d3-time-format:d3_time_format -u d3-scale -n d3_scale -o build/d3-scale.js -- build/bundle.js",
     "test": "TZ=America/Los_Angeles faucet `find test -name '*-test.js'`",
-    "prepublish": "npm run test && d3-bundler -n scale -o build/scale.js && uglifyjs build/scale.js -c -m -o build/scale.min.js && rm -f build/scale.zip && zip -j build/scale.zip -- LICENSE README.md build/scale.js build/scale.min.js"
+    "prepublish": "npm run test && uglifyjs build/d3-scale.js -c -m -o build/d3-scale.min.js && rm -f build/d3-scale.zip && zip -j build/d3-scale.zip -- LICENSE README.md build/d3-scale.js build/d3-scale.min.js"
   },
   "dependencies": {
-    "d3-arrays": "~0.1.1",
-    "d3-color": "~0.2.6",
-    "d3-format": "~0.3.3",
-    "d3-interpolate": "~0.1.2",
-    "d3-time": "~0.0.5",
-    "d3-time-format": "~0.1.3"
+    "d3-arrays": "~0.3.1",
+    "d3-color": "~0.2.8",
+    "d3-format": "~0.3.6",
+    "d3-interpolate": "~0.1.4",
+    "d3-time": "~0.0.7",
+    "d3-time-format": "~0.1.5"
   },
   "devDependencies": {
     "faucet": "0.0",
-    "d3-bundler": "0.4",
+    "rollup": "0.20.5",
     "tape": "4",
     "uglify-js": "2"
   }