diff -ur ruby-1.8.6-preview1-o/configure.in ruby-1.8.6-preview1-n/configure.in
--- ruby-1.8.6-preview1-o/configure.in	2007-02-20 01:02:11.000000000 -0700
+++ ruby-1.8.6-preview1-n/configure.in	2007-02-20 01:20:48.000000000 -0700
@@ -1241,7 +1241,7 @@
     if test "$rb_cv_missing_fconvert" = yes; then
       AC_DEFINE(MISSING_FCONVERT)
     fi
-    AC_LIBOBJ([x68.o])
+    AC_LIBOBJ([x68])
     CFLAGS="$CFLAGS -fansi-only"
     XCFLAGS="$XCFLAGS -cc1-stack=262144 -cpp-stack=2694144"
     EXEEXT=.x
@@ -1569,9 +1569,9 @@
 RUBY_LIB_PATH="${RUBY_LIB_PREFIX}/${MAJOR}.${MINOR}"
 
 AC_ARG_WITH(sitedir,
-	    [  --with-sitedir=DIR      site libraries in DIR [PREFIX/lib/ruby/site_ruby]],
+	    [  --with-sitedir=DIR      site libraries in DIR [LIBDIR/ruby/site_ruby]],
             [sitedir=$withval],
-            [sitedir='${prefix}/lib/ruby/site_ruby'])
+            [sitedir='${libdir}/ruby/site_ruby'])
 SITE_DIR=`eval echo \\"${sitedir}\\"`
 case "$target_os" in
   cygwin*|mingw*|*djgpp*|os2-emx*)