diff --git a/scripts/cmake/execute_process.cmake b/scripts/cmake/execute_process.cmake
index 2207cfab250..206bd95b121 100644
--- a/scripts/cmake/execute_process.cmake
+++ b/scripts/cmake/execute_process.cmake
@@ -7,12 +7,12 @@ is enabled.
 In order to execute a process in Download Mode call `vcpkg_execute_in_download_mode()` instead.
 #]===]
 
-if (NOT DEFINED OVERRIDEN_EXECUTE_PROCESS)
-  set(OVERRIDEN_EXECUTE_PROCESS ON)
+if (NOT DEFINED Z_VCPKG_OVERRIDEN_EXECUTE_PROCESS)
+  set(Z_VCPKG_OVERRIDEN_EXECUTE_PROCESS ON)
 
   if (DEFINED VCPKG_DOWNLOAD_MODE)
-    macro(execute_process)
+    function(execute_process)
       message(FATAL_ERROR "This command cannot be executed in Download Mode.\nHalting portfile execution.\n")
-    endmacro()
+    endfunction()
   endif()
 endif()