diff --git a/build/build.sh b/build/build.sh
new file mode 100755
index 0000000..ce955a5
--- /dev/null
+++ b/build/build.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+echo "beginning ng-annotate defs-build"
+rm -rf es5
+mkdir es5
+
+declare -a files=(ng-annotate.js ng-annotate-main.js run-tests.js)
+for i in ${files[@]}
+do
+  echo "building $i with defs"
+  defs ../$i > es5/$i
+done
+
+cp ng-annotate es5/
+
+cd es5
+
+echo "running tests (in es5 mode i.e. without --harmony)"
+cp -r ../../tests .
+/usr/bin/env node run-tests.js
+echo "done self-build"
diff --git a/build/clean.sh b/build/clean.sh
new file mode 100755
index 0000000..f922ec7
--- /dev/null
+++ b/build/clean.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+echo "cleaning build files"
+rm -rf es5 browser npm
+echo "done cleaning"
diff --git a/build/defs-config.json b/build/defs-config.json
new file mode 120000
index 0000000..9e007f5
--- /dev/null
+++ b/build/defs-config.json
@@ -0,0 +1 @@
+../defs-config.json
\ No newline at end of file
diff --git a/build/ng-annotate b/build/ng-annotate
new file mode 100755
index 0000000..107f0d5
--- /dev/null
+++ b/build/ng-annotate
@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require("./ng-annotate");
diff --git a/build/prepare.sh b/build/prepare.sh
new file mode 100755
index 0000000..acced18
--- /dev/null
+++ b/build/prepare.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+cd ..
+rm -rf build/npm
+mkdir build/npm
+git archive master -o build/npm/ng-annotate.tar --prefix=ng-annotate/
+cd build/npm
+tar xf ng-annotate.tar && rm ng-annotate.tar
+cd ng-annotate/build
+./build.sh
+cd ../..
+tar czf ng-annotate.tgz ng-annotate && rm -rf ng-annotate
diff --git a/defs-config.json b/defs-config.json
index ee8f952..c6abf36 100644
--- a/defs-config.json
+++ b/defs-config.json
@@ -2,6 +2,5 @@
     "environments": ["node"],
     "disallowVars": true,
     "disallowDuplicated": true,
-    "disallowUnknownReferences": true,
-    "stats": true
+    "disallowUnknownReferences": true
 }
diff --git a/ng-annotate b/ng-annotate-harmony
similarity index 100%
rename from ng-annotate
rename to ng-annotate-harmony
diff --git a/package.json b/package.json
index 390265f..d35e80d 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "ng-annotate",
   "version": "0.2.0",
   "description": "add, remove and rebuild angularjs dependency injection annotations",
-  "main": "ng-annotate-main.js",
+  "main": "build/es5/ng-annotate-main.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/olov/ng-annotate.git"
@@ -34,7 +34,7 @@
   "scripts": {
     "test": "node --harmony run-tests"
   },
-  "bin": "./ng-annotate",
+  "bin": "./build/es5/ng-annotate",
   "author": "Olov Lassus <olov.lassus@gmail.com>",
   "license": "MIT"
 }