diff --git a/apex/builder.go b/apex/builder.go
index 5fb9a5f..49e4642 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -390,7 +390,7 @@
 		} else {
 			if fi.class == appSet {
 				copyCommands = append(copyCommands,
-					fmt.Sprintf("unzip -q -d %s %s", destPathDir, fi.builtFile.String()))
+					fmt.Sprintf("unzip -qDD -d %s %s", destPathDir, fi.builtFile.String()))
 			} else {
 				copyCommands = append(copyCommands, "cp -f "+fi.builtFile.String()+" "+destPath)
 			}