Index: cmake-2.8.8/Modules/FindRuby.cmake
===================================================================
--- cmake-2.8.8.orig/Modules/FindRuby.cmake	2012-04-18 20:10:54.000000000 +0200
+++ cmake-2.8.8/Modules/FindRuby.cmake	2012-05-14 15:42:52.137253084 +0200
@@ -93,7 +93,7 @@ IF(RUBY_EXECUTABLE  AND NOT  RUBY_VERSIO
    _RUBY_CONFIG_VAR("sitelibdir" RUBY_SITELIB_DIR)
 
    # vendor_ruby available ?
-   EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r vendor-specific -e "print 'true'"
+   EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -e "print 'true' unless Config::CONFIG['vendorarchdir'].nil?"
       OUTPUT_VARIABLE RUBY_HAS_VENDOR_RUBY  ERROR_QUIET)
 
    IF(RUBY_HAS_VENDOR_RUBY)