--- doc/Makefile.orig	2017-05-15 07:49:44 UTC
+++ doc/Makefile
@@ -1,4 +1,4 @@
-mandir=$(prefix)/man
+mandir=$(prefix)/share/man
 man1dir=$(mandir)/man1
 
 CHAPTERS := $(SITE) blurb intro running input output licence manpage index
@@ -16,7 +16,7 @@ halibut.1: manpage.but
 halibut.1: manpage.but
 	$(HALIBUT) --man=halibut.1 manpage.but
 
-install:
+install: halibut.1
 	mkdir -p $(man1dir)
 	$(INSTALL) -m 644 halibut.1 $(man1dir)/halibut.1