Setup Trouble -- Missing Packages

[Keridoo]

I followed the install instruction and ran into the following problem. I ran this from a Win10 machine running Ubuntu 20.04 LTS on WLS2. How can I proceed from here. Thanks for your help with this.

Keridoo@WSL2:~/streisand$ ./util/venv-dependencies.sh ./venv
Found a python3 command....

This system appears to be running Ubuntu or Debian. Checking
for critical packages.

Found: build-essential
*** Missing package: python3-pip
Found: python3-openssl
Found: python3-dev
Found: python3-setuptools
*** Missing package: python3-venv
*** Missing package: python-cffi
Found: libffi-dev
Found: libssl-dev
Found: libcurl4-openssl-dev

Setup will fail without these packages. To install them:

sudo apt-get install python3-pip python3-venv python-cffi

Keridoo@WSL2:~/streisand$ sudo apt-get install python3-pip python3-venv python-cffi
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python3-pip is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package python3-venv is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python3-pip' has no installation candidate
E: Package 'python3-venv' has no installation candidate
E: Unable to locate package python-cffi