diff --git a/build.gradle b/build.gradle
index 31e31248..5afad999 100644
--- a/build.gradle
+++ b/build.gradle
@@ -174,6 +174,7 @@ task schemaZip(type: Zip) {
             }
             assert xsdFile != null
             into (shortName) {
+                duplicatesStrategy 'exclude'
                 from xsdFile.path
             }
         }