Howdy,
I just built from source using the provided script and had a couple of errors.
First, you might need to add the opus dev to the dependencies install section, I had to install it manually.
Second, after compiling, the script exited with an error that it couldn’t find install.sh. I entered the build directory manually and ran sudo make install to complete the installation.
Running Pop! OS, the version based on Ubuntu 20.04.
Kevin