diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4e6b09a823..12218f997b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -670,7 +670,7 @@ add_custom_command( OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/xlat_parser.c ${CMAKE_CUR
 
 add_custom_command( OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zcc-parse.c ${CMAKE_CURRENT_BINARY_DIR}/zcc-parse.h
 	COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_SOURCE_DIR}/zscript/zcc-parse.lemon .
-	COMMAND ${LEMON_EXE} zcc-parse.lemon
+	COMMAND lemon zcc-parse.lemon
 	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
 	DEPENDS lemon ${CMAKE_CURRENT_SOURCE_DIR}/zscript/zcc-parse.lemon )