diff --git a/ChangeLog b/ChangeLog
index bbff47c55d..26250b2c6f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jun  2 13:06:38 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* mkconfig.rb: hide build path from rbconfig.rb.
+
 Mon Jun  2 08:46:52 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* util.c (ruby_strtod, dtoa): initialize more variables for error
diff --git a/mkconfig.rb b/mkconfig.rb
index 6a2eb64040..589c6310a9 100755
--- a/mkconfig.rb
+++ b/mkconfig.rb
@@ -75,6 +75,7 @@ File.foreach "config.status" do |line|
     next if /^\$ac_\w+$/ =~ val
     next if $install_name and /^RUBY_INSTALL_NAME$/ =~ name
     next if $so_name and /^RUBY_SO_NAME$/ =~  name
+    next if /^(?:X|(?:MINI|RUN)RUBY$)/ =~ name
     if /^program_transform_name$/ =~ name and /^s(\\?.)(.*)\1$/ =~ val
       next if $install_name
       sep = %r"#{Regexp.quote($1)}"