Not sure if you still need it, but I’ve created a package for the official client here: plasticscm-{theme,core{,-unwrapped},gui{,-unwrapped}}: init at 11.0.16.9478 by musjj · Pull Request #416436 · NixOS/nixpkgs · GitHub
Not sure if you still need it, but I’ve created a package for the official client here: plasticscm-{theme,core{,-unwrapped},gui{,-unwrapped}}: init at 11.0.16.9478 by musjj · Pull Request #416436 · NixOS/nixpkgs · GitHub