Ds_ctcdecoder installation

After executing pip install $ command (python util / taskcluster.py --decoder), I am getting the following error:
ERROR: ds_ctcdecoder-0.4.1-cp27-cp27m-manylinux1_x86_64.whl is not a supported wheel on this platform.
I tried rebuilding it as mentioned here : https://discourse.mozilla.org/t/could-not-install-requirement-ds-ctcdecoder-0-4-1/47013. But unfortunately I am still not able to install ds_ctcdecoder.

We can’t help since you obviously provide no context on your system.

As well, we can’t help if you don’t tell what is wong …