When on darwin, "spotify-qt.app" is placed inside of bin instead of Applications, thus it will not be able to be called via shell or be able to be opened though the users Applications directory. Just a quick move does the job
Update pkgs/applications/audio/spotify-qt/default.nix
Co-authored-by: Pol Dellaiera <pol.dellaiera@protonmail.com>
The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.