diff --git a/build.custom/ilmerge.internalize.ignore.txt b/build.custom/ilmerge.internalize.ignore.txt
new file mode 100644
index 00000000..257e7dd7
--- /dev/null
+++ b/build.custom/ilmerge.internalize.ignore.txt
@@ -0,0 +1 @@
+Spark.*
\ No newline at end of file