diff --git a/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricWorld.java b/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricWorld.java
index f6214d571..04164a821 100644
--- a/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricWorld.java
+++ b/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/FabricWorld.java
@@ -38,6 +38,7 @@ import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.fabric.internal.ExtendedMinecraftServer;
 import com.sk89q.worldedit.fabric.internal.FabricWorldNativeAccess;
 import com.sk89q.worldedit.fabric.internal.NBTConverter;
+import com.sk89q.worldedit.fabric.mixin.AccessorDerivedLevelData;
 import com.sk89q.worldedit.fabric.mixin.AccessorPrimaryLevelData;
 import com.sk89q.worldedit.fabric.mixin.AccessorServerChunkCache;
 import com.sk89q.worldedit.internal.Constants;
@@ -316,8 +317,12 @@ public class FabricWorld extends AbstractWorld {
         LevelStorageSource levelStorage = LevelStorageSource.createDefault(tempDir);
         try (LevelStorageSource.LevelStorageAccess session = levelStorage.createAccess("WorldEditTempGen")) {
             ServerLevel originalWorld = (ServerLevel) getWorld();
-            AccessorPrimaryLevelData levelProperties = (AccessorPrimaryLevelData)
-                originalWorld.getLevelData();
+            AccessorPrimaryLevelData levelProperties;
+            if (originalWorld.getLevelData() instanceof AccessorDerivedLevelData derivedLevelData) {
+                levelProperties = (AccessorPrimaryLevelData) derivedLevelData.getWrapped();
+            } else {
+                levelProperties = (AccessorPrimaryLevelData) originalWorld.getLevelData();
+            }
             WorldGenSettings originalOpts = levelProperties.worldGenSettings();
 
             long seed = options.getSeed().orElse(originalWorld.getSeed());
diff --git a/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/AccessorDerivedLevelData.java b/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/AccessorDerivedLevelData.java
new file mode 100644
index 000000000..8af17bc61
--- /dev/null
+++ b/worldedit-fabric/src/main/java/com/sk89q/worldedit/fabric/mixin/AccessorDerivedLevelData.java
@@ -0,0 +1,32 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.fabric.mixin;
+
+import net.minecraft.world.level.storage.DerivedLevelData;
+import net.minecraft.world.level.storage.ServerLevelData;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(DerivedLevelData.class)
+public interface AccessorDerivedLevelData extends ServerLevelData {
+
+    @Accessor
+    ServerLevelData getWrapped();
+}
diff --git a/worldedit-fabric/src/main/resources/worldedit.mixins.json b/worldedit-fabric/src/main/resources/worldedit.mixins.json
index 37f3c7809..076670106 100644
--- a/worldedit-fabric/src/main/resources/worldedit.mixins.json
+++ b/worldedit-fabric/src/main/resources/worldedit.mixins.json
@@ -5,6 +5,7 @@
     "mixins": [
         "AccessorClientboundBlockEntityDataPacket",
         "AccessorPrimaryLevelData",
+        "AccessorDerivedLevelData",
         "AccessorServerChunkCache",
         "MixinLevelChunkSetBlockHook",
         "MixinMinecraftServer",