diff -ur tf-50b7.orig/unix/vars.mak.in tf-50b7.patch/unix/vars.mak.in
--- tf-50b7.orig/unix/vars.mak.in	2005-04-17 22:15:56.000000000 -0500
+++ tf-50b7.patch/unix/vars.mak.in	2006-01-28 21:30:07.000000000 -0600
@@ -12,11 +12,11 @@
 
 # @configure_input@
 
-prefix     = @prefix@
-exec_prefix= @exec_prefix@
-bindir     = @bindir@
-datadir    = @datadir@
-mandir     = @mandir@
+prefix     = ${DESTDIR}@prefix@
+exec_prefix= ${DESTDIR}@exec_prefix@
+bindir     = ${DESTDIR}@bindir@
+datadir    = ${DESTDIR}@datadir@
+mandir     = ${DESTDIR}@mandir@
 
 TFVERSION  = @TFVERSION@
 X          = @EXEEXT@
Only in tf-50b7.patch/unix: vars.mak.in~