diff -Naur tcl8.5a6.orig/unix/configure.in tcl8.5a6/unix/configure.in
--- tcl8.5a6.orig/unix/configure.in	2007-04-27 02:33:51.000000000 +0900
+++ tcl8.5a6/unix/configure.in	2007-05-16 10:27:25.000000000 +0900
@@ -645,7 +645,7 @@
 
 eval "TCL_LIB_FILE=${TCL_LIB_FILE}"
 
-TCL_LIBRARY='$(prefix)/lib/tcl$(VERSION)'
+TCL_LIBRARY='$(libdir)/tcl$(VERSION)'
 PRIVATE_INCLUDE_DIR='$(includedir)'
 HTML_DIR='$(DISTDIR)/html'