Comment 5 for bug 1768644

Confirmed fixed:

(venv) root@99e4d04174a9:/# pip install ujson
Collecting ujson
  Using cached https://files.pythonhosted.org/packages/16/c4/79f3409bc710559015464e5f49b9879430d8f87498ecdc335899732e5377/ujson-1.35.tar.gz
Building wheels for collected packages: ujson
  Running setup.py bdist_wheel for ujson ... done
  Stored in directory: /root/.cache/pip/wheels/28/77/e4/0311145b9c2e2f01470e744855131f9e34d6919687550f87d1
Successfully built ujson
Installing collected packages: ujson

Didn't have time to wait for proposed so I just downloaded the amd64 binary outputs and `gdebi -n` installed them.