diff --git a/smoke/tde/Makefile.am b/smoke/tde/Makefile.am
index 36670c88..b39ec0ab 100644
--- a/smoke/tde/Makefile.am
+++ b/smoke/tde/Makefile.am
@@ -22,3 +22,5 @@ $(x_sources) smokedata.cpp:
 	perl generate.pl
 
 CLEANFILES = $(libsmoketde_la_SOURCES)
+
+.NOTPARALLEL:
diff --git a/smoke/tqt/Makefile.am b/smoke/tqt/Makefile.am
index 29b4434b..45906e3d 100644
--- a/smoke/tqt/Makefile.am
+++ b/smoke/tqt/Makefile.am
@@ -22,3 +22,5 @@ $(x_sources) smokedata.cpp:
 	perl generate.pl
 
 CLEANFILES = $(libsmoketqt_la_SOURCES)
+
+.NOTPARALLEL: