diff --git a/build.gradle b/build.gradle
index f356a3b22..57597d7a4 100755
--- a/build.gradle
+++ b/build.gradle
@@ -60,7 +60,7 @@ sourceSets {
 minecraft {
     version = '1.12.2'
     mappings = 'stable_39'
-    tweakClass = 'baritone.launch.BaritoneTweaker'
+    tweakClass = 'org.spongepowered.asm.launch.MixinTweaker'
     runDir = 'run'
 
     // The sources jar should use SRG names not MCP to ensure compatibility with all mappings
@@ -113,6 +113,15 @@ jar {
     reproducibleFileOrder = true
 }
 
+
+jar {
+    manifest {
+        attributes(
+                'MixinConfigs': 'mixins.baritone.json'
+        )
+    }
+}
+
 task proguard(type: ProguardTask) {
     url 'https://downloads.sourceforge.net/project/proguard/proguard/6.0/proguard6.0.3.zip'
     extract 'proguard6.0.3/lib/proguard.jar'