title: could not find a version that satisfies the requirement symforce>=0.5.0
body: <p>currently I am trying to get my Flight Controller Unit(FCU) software to run and i am stuck in a situation. I am trying to bash ubuntu.sh in my cloned git folder &quot;PX4-Autopilot&quot; and i ran into an issue where it could not find a version that satisfies the requirement symforce&gt;=0.5.0. I have tried to install symforce with '''pip3 install symforce-sym''' and it was installed, however i still faced the same issue. this is what i received:</p>
  <p>Collecting symforce&gt;=0.5.0 (from -r /home/ubuntu/requirements.txt (line 29))
  Could not find a version that satisfies the requirement symforce&gt;=0.5.0 (from -r /home/ubuntu/requirements.txt (line 29)) (from versions: )
  No matching distribution found for symforce&gt;=0.5.0 (from -r /home/ubuntu/requireme</p>