diff --git a/mathgl.spec b/mathgl.spec
index 10ab386..3aea7df 100644
--- a/mathgl.spec
+++ b/mathgl.spec
@@ -346,7 +346,10 @@ pushd %{_target_platform}_$MPI_COMPILER_NAME; \
     $BUILD_MPI \\\
     ..; \
 popd; \
-make %{?_smp_mflags} -C %{_target_platform}_$MPI_COMPILER_NAME
+make -C %{_target_platform}_$MPI_COMPILER_NAME
+
+# Disable SMP build
+#make %{?_smp_mflags} -C %{_target_platform}_$MPI_COMPILER_NAME
 
 # serial
 MPI_COMPILER_NAME=serial %building_serial