diff --git a/mod-compat/src/main/java/fr/catcore/fabricatedforge/compat/mixin/codechickencore/ClassHeirachyManagerMixin.java b/mod-compat/src/main/java/fr/catcore/fabricatedforge/compat/mixin/codechickencore/ClassHeirachyManagerMixin.java
deleted file mode 100644
index c06f698d..00000000
--- a/mod-compat/src/main/java/fr/catcore/fabricatedforge/compat/mixin/codechickencore/ClassHeirachyManagerMixin.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package fr.catcore.fabricatedforge.compat.mixin.codechickencore;
-
-import codechicken.core.asm.ClassHeirachyManager;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Redirect;
-
-@Mixin(ClassHeirachyManager.class)
-public class ClassHeirachyManagerMixin {
-    @Redirect(method = "classExtends(Ljava/lang/String;Ljava/lang/String;)Z", at = @At(value = "INVOKE", target = "Ljava/lang/Class;forName(Ljava/lang/String;)Ljava/lang/Class;", remap = false), remap = false)
-    private static Class<?> fixClassExtends(String className) throws ClassNotFoundException {
-        return Class.forName(className, false, ClassHeirachyManager.class.getClassLoader());
-    }
-}
diff --git a/mod-compat/src/main/resources/fabricated-forge.mods.mixins.json b/mod-compat/src/main/resources/fabricated-forge.mods.mixins.json
index 45b543eb..a4455b2f 100644
--- a/mod-compat/src/main/resources/fabricated-forge.mods.mixins.json
+++ b/mod-compat/src/main/resources/fabricated-forge.mods.mixins.json
@@ -6,7 +6,6 @@
   "server": [],
   "mixins": [
     "codechickencore.ASMHelperMixin",
-    "codechickencore.ClassHeirachyManagerMixin",
     "codechickencore.ClassMappingMixin",
     "codechickencore.ClassOverriderMixin",
     "codechickencore.DelegatedTransformerMixin",
diff --git a/src/main/java/cpw/mods/fml/common/ModClassLoader.java b/src/main/java/cpw/mods/fml/common/ModClassLoader.java
index 02b5bc40..3565848e 100644
--- a/src/main/java/cpw/mods/fml/common/ModClassLoader.java
+++ b/src/main/java/cpw/mods/fml/common/ModClassLoader.java
@@ -113,14 +113,6 @@ public File[] getParentSources() {
                     files.add(new File(url.toURI()));
                 }
 
-                files = files.stream()
-                        .filter(file -> Objects.equals(
-                                file.getParentFile(),
-                                Constants.COREMODS_FOLDER)
-                        ).collect(Collectors.toList());
-
-                files.addAll(FabricLauncherBase.getLauncher().getClassPath().stream().map(Path::toFile).collect(Collectors.toList()));
-
                 return files.toArray(new File[0]);
             } catch (URISyntaxException e) {
                 e.printStackTrace();
diff --git a/src/main/java/cpw/mods/fml/common/discovery/ModDiscoverer.java b/src/main/java/cpw/mods/fml/common/discovery/ModDiscoverer.java
index 801953c0..c6c110a0 100644
--- a/src/main/java/cpw/mods/fml/common/discovery/ModDiscoverer.java
+++ b/src/main/java/cpw/mods/fml/common/discovery/ModDiscoverer.java
@@ -21,11 +21,13 @@
 import cpw.mods.fml.common.ModClassLoader;
 import cpw.mods.fml.common.ModContainer;
 import cpw.mods.fml.relauncher.RelaunchLibraryManager;
+import fr.catcore.fabricatedforge.Constants;
 
 import java.io.File;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Objects;
 import java.util.logging.Level;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -54,6 +56,7 @@ public void findClasspathMods(ModClassLoader modClassLoader) {
                     if (knownLibraries.contains(minecraftSources[i].getName())) {
                         FMLLog.finer("Skipping known library file %s", new Object[]{minecraftSources[i].getAbsolutePath()});
                     } else {
+                        if (!Objects.equals(minecraftSources[i].getParentFile().toString(), Constants.COREMODS_FOLDER.toString())) continue;
                         FMLLog.fine("Found a minecraft related file at %s, examining for mod candidates", new Object[]{minecraftSources[i].getAbsolutePath()});
                         this.candidates.add(new ModCandidate(minecraftSources[i], minecraftSources[i], ContainerType.JAR, i == 0, true));
                     }
diff --git a/src/main/java/cpw/mods/fml/relauncher/RelaunchClassLoader.java b/src/main/java/cpw/mods/fml/relauncher/RelaunchClassLoader.java
index f35bcfa1..ccf6d9f8 100644
--- a/src/main/java/cpw/mods/fml/relauncher/RelaunchClassLoader.java
+++ b/src/main/java/cpw/mods/fml/relauncher/RelaunchClassLoader.java
@@ -24,6 +24,7 @@
 import cpw.mods.fml.common.FMLLog;
 import fr.catcore.fabricatedforge.util.Utils;
 import fr.catcore.modremapperapi.ClassTransformer;
+import net.fabricmc.loader.api.FabricLoader;
 import net.fabricmc.loader.impl.launch.FabricLauncherBase;
 import net.fabricmc.loader.impl.util.UrlUtil;
 
@@ -70,7 +71,7 @@ public class RelaunchClassLoader extends URLClassLoader {
     private static final boolean DEBUG_CLASSLOADING = Boolean.parseBoolean(System.getProperty("fml.debugClassLoading", "false"));
 
     public RelaunchClassLoader() {
-        super(new URL[0], FabricLauncherBase.getLauncher().getTargetClassLoader());
+        super(new URL[0], FMLRelauncher.class.getClassLoader());
         this.sources = new ArrayList<>();
         this.parent = this.getClass().getClassLoader();
         this.cachedClasses = new HashMap<>(1000);
@@ -271,7 +272,7 @@ public byte[] getClassBytes(String name) throws IOException {
 
         Object i$;
         try {
-            URL classResource = this.findResource(name.replace('.', '/').concat(".class"));
+            URL classResource = ((URLClassLoader)this.parent.getParent()).findResource(name.replace('.', '/').concat(".class"));
             if (classResource != null) {
                 classStream = classResource.openStream();
                 if (DEBUG_CLASSLOADING) {