diff --git a/README.md b/README.md
index 7579923b..e6df6aa6 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,4 @@ Final version will be written in HolyC++ on templeOS.
 
 ## Project Setup
 
-Change demo4d-core to jdk8 to 11 to compile.
-
-Use the AdoptOpenJDK to run the demo.
+Use the AdoptOpenJDK(11++) to run the demo.
diff --git a/build.gradle b/build.gradle
index 380ede97..8c7582db 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,6 +13,9 @@ allprojects {
 	version = '1.0'
 	ext {
 		appName = "demo4d"
+		appJvmCode = 11
+		appEncoding = "UTF-8"
+		x4oVersion = "0.8.6"
 		gdxVersion = "1.10.0"
 		spairVersion = "1.86.0"
 		nativefilechooserVersion = "1.0.0"
@@ -42,6 +45,7 @@ project(":desktop") {
 project(":core") {
 	apply plugin: "java-library"
 	dependencies {
+		//api "org.x4o:x4o-driver:$x4oVersion"
 		api "com.badlogicgames.gdx:gdx:$gdxVersion"
 		api "io.github.spair:imgui-java-binding:$spairVersion"
 		api "io.github.spair:imgui-java-lwjgl3:$spairVersion"
diff --git a/core/build.gradle b/core/build.gradle
index d192d041..d1edc0c4 100644
--- a/core/build.gradle
+++ b/core/build.gradle
@@ -1,6 +1,6 @@
-sourceCompatibility = 1.7
-[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
+sourceCompatibility = appJvmCode
+[compileJava, compileTestJava]*.options*.encoding = appEncoding
 
-sourceSets.main.java.srcDirs = [ "src/" ]
+sourceSets.main.java.srcDirs = [ "src/", "resources/" ]
 
 eclipse.project.name = appName + "-core"
diff --git a/core/resources/META-INF/numberxd/numberxd-modules.xml b/core/resources/META-INF/numberxd/numberxd-modules.xml
new file mode 100644
index 00000000..d551d9a4
--- /dev/null
+++ b/core/resources/META-INF/numberxd/numberxd-modules.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<modules version="1.0"
+	xmlns="http://language.x4o.org/xml/ns/modules"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://language.x4o.org/xml/ns/modules http://language.x4o.org/xml/ns/modules-1.0.xsd"
+	>
+	<language version="1.0">
+		<eld-resource>numberxd-lang.eld</eld-resource>
+		<eld-resource>numberxd-base2t.eld</eld-resource>
+	</language>
+</modules>
diff --git a/core/resources/META-INF/x4o-drivers.xml b/core/resources/META-INF/x4o-drivers.xml
new file mode 100644
index 00000000..3b2b9294
--- /dev/null
+++ b/core/resources/META-INF/x4o-drivers.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<drivers version="1.0"
+	xmlns="http://language.x4o.org/xml/ns/drivers"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://language.x4o.org/xml/ns/drivers http://language.x4o.org/xml/ns/drivers-1.0.xsd"
+	>
+	<defaultDriver language="numberxd"/>
+</drivers>
diff --git a/desktop/build.gradle b/desktop/build.gradle
index 1679a532..a88ecc95 100644
--- a/desktop/build.gradle
+++ b/desktop/build.gradle
@@ -1,4 +1,6 @@
-sourceCompatibility = 1.7
+sourceCompatibility = appJvmCode
+[compileJava, compileTestJava]*.options*.encoding = appEncoding
+
 sourceSets.main.java.srcDirs = [ "src/" ]
 sourceSets.main.resources.srcDirs = ["../core/assets"]