export ARV_PACKAGES_DIR="/arvados/packages/$target"
-if [[ -f $(ls -t "$ARV_PACKAGES_DIR/$1"_*.deb | head -n1) ]] ; then
+if [[ -f $(ls -t "$ARV_PACKAGES_DIR/$1"_*.deb 2>/dev/null | head -n1) ]] ; then
debpkg=$(ls -t "$ARV_PACKAGES_DIR/$1"_*.deb | head -n1)
else
debpkg=$(ls -t "$ARV_PACKAGES_DIR/processed/$1"_*.deb | head -n1)