What's the recommended way to package and then install python application plugins?
I wrote a plugin to beancount [0] and packaged it using buildPythonPackage. Putting the two packages into a buildEnv allowed beancount to find the plugins module up until about a month ago.
Did something change in nixos's python packaging in the last month?

[0] - https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/office/beancount/default.nix