--- a/Makefile	Wed Dec 13 06:07:40 2023 +0000
+++ b/Makefile	Tue May 21 00:15:24 2024 +0000
@@ -1,18 +1,20 @@
 SUBDIR=	include libnumdb libnumutil utils
-
-INSTALL_PREFIX=	/opt/themwi
+DESTDIR=
 
 all:	${SUBDIR}
 
 utils:	libnumdb libnumutil
 
-${SUBDIR}: FRC
+${SUBDIR}: FRC config.defs
 	cd $@; ${MAKE} ${MFLAGS}
 
+config.defs:
+	@echo 'You must run ./configure before make'
+	@false
+
 install: FRC
-	mkdir -p ${INSTALL_PREFIX}
 	for i in ${SUBDIR}; do (cd $$i; ${MAKE} ${MFLAGS} \
-		INSTALL_PREFIX=${INSTALL_PREFIX} install); done
+		DESTDIR=${DESTDIR} install); done
 
 clean: FRC
 	rm -f a.out core errs