Plasma already enables SDDM Wayland by default (slightly janky though) https://github.com/NixOS/nixpkgs/blob/e57b3b16ad8758fd681511a078f35c416a8cc939/nixos/modules/services/desktop-managers/plasma6.nix#L305

Changes

2 changed files (+4/-7)

• ThinkPad-X1-Yoga-Gen-6/default.nix
  • @@ -128,10 +128,7 @@
    services.desktopManager.plasma6.enable = true; services.displayManager = { autoLogin.user = "a"; - sddm = { - enable = true; - wayland.enable = true; - }; + sddm.enable = true; }; # Give SDDM permission to read LUKS password for autologin systemd.services.display-manager.serviceConfig.KeyringMode = "inherit";
• flake.lock
  • @@ -61,11 +61,11 @@
    }, "nixpkgs": { "locked": { - "lastModified": 1758198701, - "narHash": "sha256-7To75JlpekfUmdkUZewnT6MoBANS0XVypW6kjUOXQwc=", + "lastModified": 1758427187, + "narHash": "sha256-pHpxZ/IyCwoTQPtFIAG2QaxuSm8jWzrzBGjwQZIttJc=", "owner": "NixOS", "repo": "nixpkgs", - "rev": "0147c2f1d54b30b5dd6d4a8c8542e8d7edf93b5d", + "rev": "554be6495561ff07b6c724047bdd7e0716aa7b46", "type": "github" }, "original": {