diff --git a/nim.cfg b/nim.cfg
index 15384ca83..2f5e6151d 100644
--- a/nim.cfg
+++ b/nim.cfg
@@ -18,6 +18,10 @@
 @end
 
 --threads:on
+--opt:speed
 --excessiveStackTrace:on
--d:metrics # enable metric collection
+# enable metric collection
+-d:metrics
+# add debugging symbols and original files and line numbers
+--debugger:native