--- courier/libs/Makefile.in.orig	2023-06-08 14:44:27.714775000 +0200
+++ courier/libs/Makefile.in	2023-06-08 14:47:08.188863000 +0200
@@ -1213,8 +1213,8 @@
 .PRECIOUS: Makefile
 
 
-courier_version.h: ../../version
-	echo '#define COURIER_VERSION "'`cat ../../version`'"' >courier_version.h
+courier_version.h: ../../version.txt
+	echo '#define COURIER_VERSION "'`cat ../../version.txt`'"' >courier_version.h
 
 #
 # lcrwstatic.h is dynamically built to link with initialization functions
