$NetBSD$

Don't use prebuilt binaries.

--- lib/CMakeLists.txt.orig	2021-01-27 17:07:03.000000000 +0000
+++ lib/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-include(prebuilt.cmake)
+#include(prebuilt.cmake)
 
 ADD_SUBDIRECTORY(libjpeg)