title: How to install specific version of Cap'n Proto (v0.8.0)?
body: <pre><code>sudo apt install capnproto
  </code></pre>
  <p>This installs v0.7.0 in my ubuntu 20.04. However, i require v0.8.0 to be installed.</p>
  <p>Also, i need  v0.6.1 to be installed additionally for backward compatibility.</p>
  <p>Any solution for these two cases ?</p>