nix: expose python

default.nix

@@ -217,6 +217,9 b' let'
         # python based programs need to be wrapped
         mkdir -p $out/bin
 
+        # expose python
+        ln -s ${self.python}/bin/python $out/bin/
+
         # required binaries from dependencies
         ln -s ${self.supervisor}/bin/supervisorctl $out/bin/
         ln -s ${self.supervisor}/bin/supervisord $out/bin/