diff --git a/build.js b/build.js
index 55311376df5aa..a6f9f26403e25 100755
--- a/build.js
+++ b/build.js
@@ -17,7 +17,7 @@ const ncp = require('ncp');
 
 const filterStylusPartials = require('./scripts/plugins/filter-stylus-partials');
 const mapHandlebarsPartials = require('./scripts/plugins/map-handlebars-partials');
-const versions = require('./source/versions');
+const loadVersions = require('./scripts/load-versions')
 
 /** Build **/
 
@@ -43,18 +43,7 @@ function i18nJSON (lang) {
     return finalJSON;
 }
 
-const source = {
-    project: {
-        versions,
-        currentVersion: versions[0].version,
-        banner: {
-            visible: false,
-            content: 'Important <a href="#">security release</a>, please update now!'
-        }
-    }
-};
-
-function buildlocale (locale) {
+function buildlocale (source, locale) {
     console.time('[metalsmith] build/' + locale + ' finished');
     const siteJSON = path.join(__dirname, 'locale', locale, 'site.json');
     const metalsmith = Metalsmith(__dirname);
@@ -177,9 +166,23 @@ function copystatic () {
 
 function fullbuild () {
     copystatic();
-    fs.readdir(path.join(__dirname, 'locale'), function (e, locales) {
-        locales.forEach(function (locale) {
-            buildlocale(locale);
+    loadVersions(function (err, versions) {
+        if (err) { throw err; }
+        const source = {
+            project: {
+                versions,
+                currentVersion: versions[0].version,
+                banner: {
+                    visible: false,
+                    content: 'Important <a href="#">security release</a>, please update now!'
+                }
+            }
+        };
+
+        fs.readdir(path.join(__dirname, 'locale'), function (e, locales) {
+            locales.forEach(function (locale) {
+                buildlocale(source, locale);
+            });
         });
     });
 }
diff --git a/scripts/load-versions.js b/scripts/load-versions.js
index d907967c0e0d7..4bc801d2eccb5 100755
--- a/scripts/load-versions.js
+++ b/scripts/load-versions.js
@@ -7,7 +7,18 @@ const semver = require('semver');
 const map = require('map-async');
 const https = require('https');
 
-map([ 'https://nodejs.org/dist/index.json', 'https://iojs.org/dist/index.json' ], download, munge);
+function loadVersions (callback) {
+    map(
+      [ 'https://nodejs.org/dist/index.json', 'https://iojs.org/dist/index.json' ],
+      download,
+      function (err, versions) {
+        if (err)
+            return callback(err);
+        versions = munge(versions);
+        callback(null, versions);
+      }
+    );
+}
 
 function download (url, cb) {
     let data = '';
@@ -26,13 +37,7 @@ function download (url, cb) {
     });
 }
 
-function munge (err, versions) {
-    if (err) {
-        console.error('Aborting due to download error from node or iojs');
-        console.error(err.stack)
-        return process.exit(1);
-    }
-
+function munge (versions) {
     versions[0].forEach(function (v) {
         v.url = 'https://nodejs.org/dist/' + v.version + '/'
         v.name = 'Node.js'
@@ -48,5 +53,19 @@ function munge (err, versions) {
         return semver.compare(b.version, a.version);
     });
 
-    fs.writeFileSync(__dirname + '/../source/versions.json', JSON.stringify(allVersions, null, 2));
+    return allVersions;
 }
+
+module.exports = loadVersions;
+
+if (require.main === module) {
+    loadVersions(function (err, versions) {
+        if (err) {
+            console.error('Aborting due to download error from node or iojs');
+            console.error(err.stack);
+            return process.exit(1);
+        }
+
+        fs.writeFileSync(__dirname + '/../source/versions.json', JSON.stringify(versions, null, 2));
+    })
+}
\ No newline at end of file