vmcloak installation fails

[vuusale]

I'm trying to setup cuckoo on ubuntu using the guide in https://hatching.io/blog/cuckoo-sandbox-setup/. I got stuck at Automatic VM creation step, because I can't install vmcloak. Python-pip cant be installed because python2.7 has been deprecated, so I installed pip2 through get-pip, then issued the following command:
pip2 install -U cuckoo vmcloak
All dependencies are installed without problem except pyrsistent, it gives the following error:
pyrsistent requires Python '>=3.5' but the running Python is 2.7.18
I tried to install previous versions of vmcloak and pyrsistent, but no luck. Anyone able to resolve this issue?