If `services.samba.enable` is true, the the samba Module already adds the samba Package. If a User sets a differnet Package in `services.samba.package` then `environment.systemPackages` will contain two different samba Packages.
```
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/testparm' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/testparm'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/testparm' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/testparm'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/nmbd' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/nmbd'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/nmbd' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/nmbd'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/smbcontrol' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/smbcontrol'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/smbcontrol' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/smbcontrol'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/gentest' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/gentest'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/gentest' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/gentest'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/smbpasswd' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/smbpasswd'
system-path> warning: collision between `/nix/store/rw5fzn10lb21xk3myc0d4m49j69d0crs-samba-4.19.2/bin/smbd' and `/nix/store/ssxn9pnl293knqghcjvpbzb6ysg0f7fv-samba-4.19.2/bin/smbd'
...
```
(The original samba will still stay in the closure as `kdenetwork-filesharing` depends on it.)