from .runner import (upload_dependencies, packed_workflow, upload_workflow_collection,
trim_anonymous_location, remove_redundant_fields, discover_secondary_files)
from .pathmapper import ArvPathMapper, trim_listing
-from .arvtool import ArvadosCommandTool
+from .arvtool import ArvadosCommandTool, check_cluster_target
from .perf import Perf
logger = logging.getLogger('arvados.cwl-runner')