message: setting client to dev branch
diff: set -e
  ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." >/dev/null 2>&1 && pwd)"
  +NCTL_CLIENT_BRANCH='dev'
  # Activate Environment
  pushd "$ROOT_DIR"
  source $(pwd)/utils/nctl/activate
  -# TODO: Remove this after feat-fast-sync merges to dev
  -#
  -# Hack for picking between dev and feat-fast-sync branch for client
  -# ... casper-mainnet feature flag is removed in feat-fast-sync
  -if ( cat "$NCTL"/sh/assets/compile_client.sh | grep -q casper-mainnet ); then
  - NCTL_CLIENT_BRANCH='dev'
  -else
  - NCTL_CLIENT_BRANCH='feat-fast-sync'
  -fi
  -
  # Clone the client and launcher repos if required.
  if [ ! -d "$NCTL_CASPER_CLIENT_HOME" ]; then
  echo "Checking out $NCTL_CLIENT_BRANCH of casper-client-rs..."
  