--- doc/CMakeLists.txt.orig	2019-03-12 18:04:35 UTC
+++ doc/CMakeLists.txt
@@ -1,4 +1,4 @@
-if (DOXYGEN_FOUND)
+if (XXX_DOXYGEN_FOUND)
 
 	configure_file("${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in"
 	  "${CMAKE_CURRENT_BINARY_DIR}/Doxyfile" @ONLY)
