1 files changed, 2 insertions, 0 deletions
diff --git a/ext/extmk.rb b/ext/extmk.rb
index 5b8224235d..f1fe814792 100755
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -584,6 +584,8 @@ extend Module.new {
         }
       end
 
+      conf = yield conf if block
+
       if conf.any? {|s| /^TARGET *= *\S/ =~ s}
         conf << %{
 gem_platform = #{Gem::Platform.local}