Unable to install DS_ctcdecoder

the below command give the following error.
pip3 install $(python3 util/taskcluster.py --decoder)
usage: taskcluster.py [-h] [–target TARGET] [–arch ARCH]
[–artifact ARTIFACT] [–source SOURCE]
[–branch BRANCH]
taskcluster.py: error: unrecognized arguments: --decoder
Defaulting to user installation because normal site-packages is not writeable
ERROR: You must give at least one requirement to install (see “pip help install”)