diff --git a/CMakeLists.txt b/CMakeLists.txt
index 59a3c34..e000e6e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,5 +87,3 @@ target_link_libraries(example PUBLIC aare)
 if(AARE_PYTHON_BINDINGS)
     add_subdirectory(python)
 endif()
-
-set(ENV{PROJECT_ROOT_DIR} ${PROJECT_SOURCE_DIR})