diff --git a/source/Ox/js/Constants.js b/source/Ox/js/Constants.js
index 1f0df000..8e8ac77f 100644
--- a/source/Ox/js/Constants.js
+++ b/source/Ox/js/Constants.js
@@ -77,7 +77,7 @@ Ox.SHORT_MONTHS = Ox.MONTHS.map(function(val) {
     return val.slice(0, 3);
 });
 //@ Ox.PATH <str> Path of Ox.js
-Ox.PATH = Array.prototype.slice.call(
+Ox.PATH = Ox.toArray(
     document.getElementsByTagName('script')
 ).reverse().filter(function(element) {
     return /Ox\.js$/.test(element.src);
diff --git a/source/Ox/js/HTML.js b/source/Ox/js/HTML.js
index 7da15250..81eeefb9 100644
--- a/source/Ox/js/HTML.js
+++ b/source/Ox/js/HTML.js
@@ -64,7 +64,7 @@
         },
         salt = Ox.range(2).map(function(){
             return Ox.range(16).map(function() {
-                return String.fromCharCode(65 + Ox.random(26));
+                return Ox.char(65 + Ox.random(26));
             }).join('');
         });
 
diff --git a/tools/build/build.py b/tools/build/build.py
index 2ae502e0..9c1e3592 100755
--- a/tools/build/build.py
+++ b/tools/build/build.py
@@ -99,8 +99,15 @@ def build_oxjs(downloads=False, geo=False):
         ],
         [
             'Function.js', # getSortValue (Array.js) depends on Ox.cache
-            'Math.js', # Ox.MAX_LATITUDE (Constants.js) depends on Ox.sinh
-            'Polyfill.js', # FIXME: not clear if needed here
+            'Polyfill.js' # FIXME: not clear if needed here
+        ],
+        [
+            'Array.js', # Ox.slice (Collection.js) depends on Ox.toArray, salt (HTML.js) depends on Ox.range
+            'String.js' # salt (HTML.js) depends on Ox.char
+        ],
+        [
+            'Collection.js', # Ox.PATH (Constants.js) depends on Ox.slice
+            'Math.js' # Ox.MAX_LATITUDE (Constants.js) depends on Ox.sinh
         ]
     ]
     js = ''