--- Makefile.in
+++ Makefile.in
@@ -69,7 +69,7 @@
 	$(MAKE) all
 
 src/doc/commands.txt: @progname@ Makefile
-	./@progname@ --doc > src/doc/commands.txt
+	src/tron/@progname@ --doc > src/doc/commands.txt
 
 # build documentation from M4 sources or just copy it
 documentation: src/doc/commands.txt src/doc/* src/doc/net/*