diff --git a/CMakeLists.txt b/CMakeLists.txt

index fa5aff0..544aeae 100644

--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -149,6 +149,7 @@ if(RDK_BUILD_PYTHON_WRAPPERS)

     message("Python Install directory ${PYTHON_INSTDIR}")

     install(DIRECTORY rdkit DESTINATION ${PYTHON_INSTDIR}

       COMPONENT python

+      PATTERN "sping" EXCLUDE

       PATTERN ".svn" EXCLUDE

       PATTERN "test_data" EXCLUDE

       PATTERN "testData" EXCLUDE