diff --git a/java/bootclasspath_fragment.go b/java/bootclasspath_fragment.go
index 4aaf3d4..10d2fe2 100644
--- a/java/bootclasspath_fragment.go
+++ b/java/bootclasspath_fragment.go
@@ -648,7 +648,8 @@
 	}
 
 	// Copy the dex jars of this fragment's content modules to their predefined locations.
-	copyBootJarsToPredefinedLocations(ctx, contents, imageConfig.modules, imageConfig.dexPaths)
+	bootDexJarByModule := extractEncodedDexJarsFromModules(ctx, contents)
+	copyBootJarsToPredefinedLocations(ctx, bootDexJarByModule, imageConfig.dexPathsByModule)
 
 	// Build a profile for the image config and then use that to build the boot image.
 	profile := bootImageProfileRule(ctx, imageConfig)