$OpenBSD: patch-external_CMakeLists_txt,v 1.1.1.1 2019/06/22 15:24:31 thfr Exp $

Index: external/CMakeLists.txt
--- external/CMakeLists.txt.orig
+++ external/CMakeLists.txt
@@ -19,7 +19,7 @@ if (DEFINED SPIRV-Headers_SOURCE_DIR)
 else()
   if (IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/SPIRV-Headers)
     set(SPIRV_HEADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/SPIRV-Headers)
-  else()
+  elseif(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/spirv-headers)
     set(SPIRV_HEADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/spirv-headers)
   endif()
 endif()
