diff --git a/sagemath.spec b/sagemath.spec
index cbb640e..f503a12 100644
--- a/sagemath.spec
+++ b/sagemath.spec
@@ -860,6 +860,7 @@ mkdir -p $DOT_SAGE/tmp
 
 export PATH=%{buildroot}%{_bindir}:$PATH
 export PYTHONPATH=%{buildroot}%{python_sitearch}:$PYTHONPATH
+export PYTHONPATH=%{_builddir}%{python_sitearch}:$PYTHONPATH
 
 #------------------------------------------------------------------------
 mkdir -p %{buildroot}%{_bindir}