diff --git a/prototypes/quic_demo/build_app_package.bash b/prototypes/quic_demo/build_app_package.bash
index 6260846..f396d81 100755
--- a/prototypes/quic_demo/build_app_package.bash
+++ b/prototypes/quic_demo/build_app_package.bash
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# Run from `ptth/`
 
 set -euo pipefail
 
@@ -8,11 +9,9 @@ DOCKER_TAG="ptth_quic:latest"
 
 mkdir -p app_packages
 
-pushd ../../
-git archive --format=tar "$GIT_COMMIT" | sudo docker build -f prototypes/quic_demo/Dockerfile -t "$DOCKER_TAG" --build-arg "git_version=$GIT_COMMIT" -
-popd
+git archive --format=tar "$GIT_COMMIT" | docker build -f prototypes/quic_demo/Dockerfile -t "$DOCKER_TAG" --build-arg "git_version=$GIT_COMMIT" -
 
-sudo docker run --rm "$DOCKER_TAG" \
+docker run --rm "$DOCKER_TAG" \
 tar -c \
 app \
 quic_demo_relay_server \