diff --git a/external/capnp/.gitignore b/external/capnp/.gitignore
new file mode 100644
index 0000000000..db55381fd5
--- /dev/null
+++ b/external/capnp/.gitignore
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:45c249a63ea53ef9ed9754aa8c1cec5f23fa1c5a65be507e0b48f29efad0b40d
+size 37
diff --git a/tools/ubuntu_setup.sh b/tools/ubuntu_setup.sh
index c968e0b7a4..90272ada6f 100755
--- a/tools/ubuntu_setup.sh
+++ b/tools/ubuntu_setup.sh
@@ -51,7 +51,9 @@ pip install pipenv==2018.11.26
 cd ../
 pipenv install --system --deploy
 
-# TODO: add openpilot to PYTHONPATH
+# TODO: add openpilot to PYTHONPATH and external to PATH
 # export PYTHONPATH="$HOME/openpilot"
+# export PATH="$PATH:$HOME/openpilot/external/capnp/bin"
 
+# TODO: run external/capnp/build.sh ... needed?