--- ./Makefile.in.orig	2004-04-07 08:33:39.000000000 -0700
+++ ./Makefile.in	2005-06-16 11:29:46.000000000 -0700
@@ -114,7 +114,7 @@
 infodir=@infodir@
 
 # `docdir' says where to install documentation files.
-docdir=$(datadir)/doc/groff/$(version)$(revision)
+docdir=$(prefix)/doc/groff-$(version)$(revision)
 
 # `exampledir' says where to install example files.
 exampledir=$(docdir)/examples