--- installer/unix.tcl.orig	Sat Sep 20 20:47:35 1997
+++ installer/unix.tcl	Sat Sep 20 20:47:37 1997
@@ -228,7 +228,7 @@
 proc getCC {} {
     global CC GCC SCflag CFlags Type SLDflag share scflags
     switch {} $CC {} default return
-    set CFlags -O
+    set CFlags {-O -I/usr/local/include/tcl8.1}
     catch {set CFlags $cflags($Type)}
     switch BSDI $Type {
 	set CC gcc2