diff --git a/src/intel/genxml/Makefile.am b/src/intel/genxml/Makefile.am
index 77b2f193d9f..be3ad4164e9 100644
--- a/src/intel/genxml/Makefile.am
+++ b/src/intel/genxml/Makefile.am
@@ -26,7 +26,9 @@ BUILT_SOURCES =                                         \
 	gen8_pack.h					\
 	gen9_pack.h
 
+PYTHON3_GEN = $(AM_V_GEN)$(PYTHON3) $(PYTHON_FLAGS)
+
 %_pack.h : %.xml gen_pack_header.py
-	$(AM_V_GEN) $(srcdir)/gen_pack_header.py $< > $@
+	$(PYTHON3_GEN) $(srcdir)/gen_pack_header.py $< > $@
 
 CLEANFILES = $(BUILT_SOURCES)
diff --git a/src/intel/genxml/gen_pack_header.py b/src/intel/genxml/gen_pack_header.py
old mode 100755
new mode 100644