title: Unable to load swrast for Anaconda spyder
body: <p>I'm running Anaconda Spyder on Fedora 34.</p>
  <p>When I run spyder I get the following error</p>
  <pre><code>No QCoreApplication instance found. Application patches not applied. You have to call load_stylesheet function after instantiation of QApplication to take effect. 
  libGL error: MESA-LOADER: failed to open iris: /home/ted/anaconda3/lib/python3.8/site-packages/zmq/backend/cython/../../../../.././libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /usr/lib64/dri/iris_dri.so) (search paths /usr/lib64/dri)
  libGL error: failed to load driver: iris
  libGL error: MESA-LOADER: failed to open swrast: /home/ted/anaconda3/lib/python3.8/site-packages/zmq/backend/cython/../../../../.././libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by /usr/lib64/dri/swrast_dri.so) (search paths /usr/lib64/dri)
  libGL error: failed to load driver: swrast
  libpng warning: bKGD: invalid
  libpng warning: bKGD: invalid
  </code></pre>
  <p>I can see that libstdc++.so.6 is in /usr/lib64, but the search path is /usr/lib64/dri</p>
  <p>How can I get iris and swrast to search /usr/lib64 for the driver?
  Creating a symlink didn't work.</p>