diff --git a/FindMyxlibThirdparty.cmake b/FindMyxlibThirdparty.cmake
index 9136853..581628f 100644
--- a/FindMyxlibThirdparty.cmake
+++ b/FindMyxlibThirdparty.cmake
@@ -8,13 +8,14 @@ list(APPEND _ext_project_args
   INSTALL_DIR      ${CMAKE_BINARY_DIR}
   BUILD_BYPRODUCTS ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libmyx-qt.a
                    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libmyx-filesystem.a
-  CMAKE_ARGS       ${CMLIB_EXT_PROJ_DEFAULT_ARGS})
+  CMAKE_ARGS       ${CMLIB_EXT_PROJ_DEFAULT_ARGS}
+                   <SOURCE_DIR>)
 if(MyxlibThirdparty_FIND_COMPONENTS STREQUAL "headers")
   list(APPEND _ext_project_args
     BUILD_COMMAND     true
     INSTALL_COMMAND   ${CMAKE_MAKE_PROGRAM} myxlib-install-headers)
 endif()
-ExternalProject_Add(${_ext_project_args} <SOURCE_DIR>)
+ExternalProject_Add(${_ext_project_args})
 unset(_ext_project_args)
 
 set(MYXLIB_IS_EXTERNAL_PROJECT ON CACHE BOOL "" FORCE)