diff -Naur heirloom-ex-vi-bd1f886598d20d457885c5c189fea34b027cbdef/Makefile.in heirloom-ex-vi-bd1f886598d20d457885c5c189fea34b027cbdef-patched/Makefile.in
--- heirloom-ex-vi-bd1f886598d20d457885c5c189fea34b027cbdef/Makefile.in	2022-05-28 22:59:12.000000000 +0300
+++ heirloom-ex-vi-bd1f886598d20d457885c5c189fea34b027cbdef-patched/Makefile.in	2024-12-13 00:08:07.261012593 +0300
@@ -79,10 +79,10 @@
 # Destinations for installation. $(PRESERVEDIR) is used for recovery files.
 # It will get mode 1777.
 #
-PREFIX		= /usr/local
-BINDIR		= $(PREFIX)/bin
-LIBEXECDIR	= $(PREFIX)/libexec
-MANDIR		= $(PREFIX)/share/man
+PREFIX		= /usr
+BINDIR		= $(PREFIX)/5bin
+LIBEXECDIR	= $(PREFIX)/5lib
+MANDIR		= $(PREFIX)/share/man/5man
 PRESERVEDIR	= /var/preserve
 
 #