--- cmake-3.0.0-rc2.orig/Modules/FindRuby.cmake	2014-03-17 19:18:29.000000000 +0100
+++ cmake-3.0.0-rc2/Modules/FindRuby.cmake	2014-03-20 02:44:47.693351223 +0100
@@ -116,7 +116,7 @@
    _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} -r rbconfig -e "print 'true' unless Config::CONFIG['vendorarchdir'].nil?"
       OUTPUT_VARIABLE RUBY_HAS_VENDOR_RUBY  ERROR_QUIET)
 
    if(RUBY_HAS_VENDOR_RUBY)