diff --git a/vtk.spec b/vtk.spec
index 17b813e..93cf531 100644
--- a/vtk.spec
+++ b/vtk.spec
@@ -6,7 +6,7 @@
 %global _lto_cflags %{nil}
 
 # There is a circular dep with opencascade
-%bcond bootstrap 0
+%bcond bootstrap 1
 
 # OSMesa and X support are mutually exclusive.
 # TODO - buid separate OSMesa version if desired