if ! test -d "$COMPOSER_ROOT" ; then
git clone https://github.com/arvados/composer.git "$COMPOSER_ROOT"
git -C "$COMPOSER_ROOT" checkout arvados-fork
if ! test -d "$COMPOSER_ROOT" ; then
git clone https://github.com/arvados/composer.git "$COMPOSER_ROOT"
git -C "$COMPOSER_ROOT" checkout arvados-fork