diff --git a/Unity/Editor/Configurator.cs b/Unity/Editor/Configurator.cs
new file mode 100644
index 0000000..25942ee
--- /dev/null
+++ b/Unity/Editor/Configurator.cs
@@ -0,0 +1,88 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+using UnityEditor.Callbacks;
+using UnityEditor.PackageManager.Requests;
+using UnityEditor.PackageManager;
+
+namespace RoboidControl.Unity
+{
+    [InitializeOnLoad]
+    public class ConfigurationCheck
+    {
+        static ConfigurationCheck()
+        {
+            RetrievePackageList();
+        }
+
+        protected static ListRequest request;
+        public static List<string> packageNameList;
+
+        public static void RetrievePackageList()
+        {
+            request = Client.List();    // List packages installed for the Project
+            EditorApplication.update += Progress;
+        }
+
+        public static void Progress()
+        {
+            if (request.IsCompleted)
+            {
+                if (request.Status == StatusCode.Success)
+                {
+                    packageNameList = new List<string>();
+                    foreach (UnityEditor.PackageManager.PackageInfo package in request.Result)
+                        packageNameList.Add(package.name);
+                        
+                    DidReloadScripts();                    
+                }
+                else if (request.Status >= StatusCode.Failure)
+                    Debug.Log(request.Error.message);
+
+                EditorApplication.update -= Progress;
+            }
+        }
+
+        //[DidReloadScripts]
+        protected static void DidReloadScripts()
+        {
+            if (packageNameList == null)
+                return;
+            CheckExtension(
+                packageNameList.Contains("com.unity.cloud.gltfast"), "GLTF");
+        }
+
+        protected static void CheckExtension(bool enabled, string define)
+        {
+            if (enabled)
+                GlobalDefine(define);
+            else
+                GlobalUndefine(define);
+        }
+
+        public static void GlobalDefine(string name)
+        {
+            //Debug.Log("Define " + name);
+            string scriptDefines = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
+            if (!scriptDefines.Contains(name))
+            {
+                string newScriptDefines = scriptDefines + " " + name;
+                if (EditorUserBuildSettings.selectedBuildTargetGroup != 0)
+                    PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup, newScriptDefines);
+            }
+        }
+
+        public static void GlobalUndefine(string name)
+        {
+            //Debug.Log("Undefine " + name);
+            string scriptDefines = PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup);
+            if (scriptDefines.Contains(name))
+            {
+                int playMakerIndex = scriptDefines.IndexOf(name);
+                string newScriptDefines = scriptDefines.Remove(playMakerIndex, name.Length);
+                PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup, newScriptDefines);
+            }
+
+        }
+    }
+}
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