diff --git a/cmake/QtBuildPathsHelpers.cmake b/cmake/QtBuildPathsHelpers.cmake
index bd186c28b..2c1994d2e 100644
--- a/cmake/QtBuildPathsHelpers.cmake
+++ b/cmake/QtBuildPathsHelpers.cmake
@@ -135,11 +135,13 @@ function(qt_configure_process_path name default docstring)
         elseif(rel_path MATCHES "^\.\./")
             # INSTALL_SYSCONFDIR is allowed to be outside the prefix.
             if(NOT name STREQUAL "INSTALL_SYSCONFDIR")
-                message(FATAL_ERROR
-                    "Path component '${name}' is outside computed install prefix: ${rel_path} ")
-                return()
+                #message(FATAL_ERROR
+                #    "Path component '${name}' is outside computed install prefix: ${rel_path} ")
+                #return()
+                set("${name}" "${rel_path}" CACHE STRING "${docstring}" FORCE)
+            else()
+                set("${name}" "${${name}}" CACHE STRING "${docstring}" FORCE)
             endif()
-            set("${name}" "${${name}}" CACHE STRING "${docstring}" FORCE)
         else()
             set("${name}" "${rel_path}" CACHE STRING "${docstring}" FORCE)
         endif()