Cloned from nixopsenv from adisbladis.
Pinned nixpkgs version, so you can just use default.nix to build it or include
it somewhere else.
Pinned nixpkgs should not imply, you have to use the nixpkgs version this was
build with, anywhere else. It is just a python app being build and after
that nixops should pick up, which nixpkgs to use the usual way it always does.
Didn't get the hetzner plugin to work, sorry for that.
The general steps to add a plugin:
Install poetry in some way.
Add your plugin to pyproject.toml and in withplug.nix.
Run poetry lock. If you made any errors editing pyproject.toml it should
tell you.
Run nix-build.