diff -Nrup a/Modules/FindRuby.cmake b/Modules/FindRuby.cmake

--- a/Modules/FindRuby.cmake	2014-01-16 12:15:08.000000000 -0500

+++ b/Modules/FindRuby.cmake	2016-03-02 16:10:18.242811297 -0500

@@ -101,14 +101,8 @@ if(RUBY_EXECUTABLE  AND NOT  RUBY_VERSIO

    _RUBY_CONFIG_VAR("sitearchdir" RUBY_SITEARCH_DIR)

    _RUBY_CONFIG_VAR("sitelibdir" RUBY_SITELIB_DIR)

-   # vendor_ruby available ?

-   execute_process(COMMAND ${RUBY_EXECUTABLE} -r vendor-specific -e "print 'true'"

-      OUTPUT_VARIABLE RUBY_HAS_VENDOR_RUBY  ERROR_QUIET)

-

-   if(RUBY_HAS_VENDOR_RUBY)

-      _RUBY_CONFIG_VAR("vendorlibdir" RUBY_VENDORLIB_DIR)

-      _RUBY_CONFIG_VAR("vendorarchdir" RUBY_VENDORARCH_DIR)

-   endif()

+   _RUBY_CONFIG_VAR("vendorlibdir" RUBY_VENDORLIB_DIR)

+   _RUBY_CONFIG_VAR("vendorarchdir" RUBY_VENDORARCH_DIR)

    # save the results in the cache so we don't have to run ruby the next time again

    set(RUBY_VERSION_MAJOR    ${RUBY_VERSION_MAJOR}    CACHE PATH "The Ruby major version" FORCE)