--- vgrind.sh.orig     Sat Oct 23 20:30:20 2010
+++ vgrind.sh  Mon May 30 11:10:15 2011
@@ -40,8 +40,8 @@ else
 	set troff = "groff"
 endif
 
-set vf=/usr/libexec/vfontedpr
-set tm=/usr/share/tmac
+set vf=${PREFIX}/libexec/vfontedpr
+set tm=${PREFIX}/share/groff/site-tmac
 
 set voptions=
 set options=