--- apron/Makefile.orig	2020-09-11 15:30:57 UTC
+++ apron/Makefile
@@ -163,7 +163,7 @@ ap_version.h: ../version.mk
 	echo "#define AP_VERSION       \"${VERSION_STR}\"" >> $@
 	echo "#endif" >> $@
 
-.PHONY : dep depend
+.PHONY : dep
 
 #--------------------------------------------------------------
 # IMPLICIT RULES AND DEPENDENCIES