--- tp/Makefile.am.bak	2022-10-11 17:00:52.000000000 +0200
+++ tp/Makefile.am	2022-10-22 23:41:29.988502422 +0200
@@ -325,7 +325,7 @@
 
 Texinfo/Commands.pm: Texinfo/XS/parsetexi/command_data.txt
 	$(MKDIR_P) Texinfo
-	$(srcdir)/maintain/regenerate_commands_perl_info.pl < $<
+	$(srcdir)/maintain/regenerate_commands_perl_info.pl < $(srcdir)/Texinfo/XS/parsetexi/command_data.txt
 
 libsrcdir = $(srcdir)/maintain/lib