diff --git a/export/planloader/tests/CMakeLists.txt b/export/planloader/tests/CMakeLists.txt
index debc785b..2f4939f0 100644
--- a/export/planloader/tests/CMakeLists.txt
+++ b/export/planloader/tests/CMakeLists.txt
@@ -15,7 +15,10 @@ add_test_case(
   gtest
   gtest_main)
 
-set(TEXTPLAN_SOURCE_DIR "${CMAKE_SOURCE_DIR}/src/substrait/textplan")
+cmake_path(GET CMAKE_CURRENT_SOURCE_DIR PARENT_PATH TEXTPLAN_SOURCE_DIR)
+cmake_path(GET TEXTPLAN_SOURCE_DIR PARENT_PATH TEXTPLAN_SOURCE_DIR)
+cmake_path(GET TEXTPLAN_SOURCE_DIR PARENT_PATH TEXTPLAN_SOURCE_DIR)
+set(TEXTPLAN_SOURCE_DIR "${TEXTPLAN_SOURCE_DIR}/src/substrait/textplan")
 
 add_custom_command(
   TARGET planloader_test