diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 6a77c6d6..b211831c 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -4,7 +4,9 @@
 - cache
 
 # C deps
+#  https://github.com/joyent/node
 - ^deps/
+- ^tools/
 
 # Node depedencies
 - ^node_modules/