Move MixinExtras init earlier

src/main/java/org/embeddedt/vintagefix/core/MixinConfigPlugin.java

@@ -3,7 +3,6 @@
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableListMultimap;
 import com.google.common.collect.ImmutableMap;
-import com.llamalad7.mixinextras.MixinExtrasBootstrap;
 import net.minecraft.launchwrapper.Launch;
 import net.minecraftforge.fml.common.FMLCommonHandler;
 import net.minecraftforge.fml.common.Loader;
@@ -99,7 +98,6 @@ private static void writeOrderedProperties(Properties props, OutputStream stream
     @Override
     public void onLoad(String s) {
         if(allMixins.size() == 0) {
-            MixinExtrasBootstrap.init();
             try {
                 URI uri = Objects.requireNonNull(MixinConfigPlugin.class.getResource("/mixins.vintagefix.json")).toURI();
                 FileSystem fs;

src/main/java/org/embeddedt/vintagefix/core/MixinExtrasBootstrapPlugin.java

@@ -0,0 +1,47 @@
+package org.embeddedt.vintagefix.core;
+
+import com.llamalad7.mixinextras.MixinExtrasBootstrap;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+
+public class MixinExtrasBootstrapPlugin implements IMixinConfigPlugin {
+    @Override
+    public void onLoad(String s) {
+        MixinExtrasBootstrap.init();
+    }
+
+    @Override
+    public String getRefMapperConfig() {
+        return "";
+    }
+
+    @Override
+    public boolean shouldApplyMixin(String s, String s1) {
+        return false;
+    }
+
+    @Override
+    public void acceptTargets(Set<String> set, Set<String> set1) {
+
+    }
+
+    @Override
+    public List<String> getMixins() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public void preApply(String s, ClassNode classNode, String s1, IMixinInfo iMixinInfo) {
+
+    }
+
+    @Override
+    public void postApply(String s, ClassNode classNode, String s1, IMixinInfo iMixinInfo) {
+
+    }
+}

src/main/java/org/embeddedt/vintagefix/core/VintageFixCore.java

@@ -133,6 +133,6 @@ public List<String> getMixinConfigs() {
             applyMixinFix();
             mixinFixApplied = true;
         }
-        return ImmutableList.of("mixins.vintagefix.json");
+        return ImmutableList.of("mixins.vintagefix.init.json", "mixins.vintagefix.json");
     }
 }

src/main/resources/mixins.vintagefix.init.json

@@ -0,0 +1,18 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "org.embeddedt.vintagefix.mixin",
+  "plugin": "org.embeddedt.vintagefix.core.MixinExtrasBootstrapPlugin",
+  "target": "@env(INIT)",
+  "compatibilityLevel": "JAVA_8",
+  "mixins": [
+  ],
+  "client": [
+  ],
+  "overwrites": {
+    "conformVisibility": true
+  },
+  "injectors": {
+    "defaultRequire": 1
+  }
+}