sway: switch back to shipping the nixpkgs-wayland version

hosts/common/programs/assorted.nix

@@ -1146,6 +1146,8 @@ in
       '';
     });
 
+    swaybg.sandbox.method = null;  #< TODO: sandbox
+
     swappy.sandbox.autodetectCliPaths = "existingFileOrParent";
     swappy.sandbox.whitelistWayland = true;
 

hosts/common/programs/sway/default.nix

@@ -9,12 +9,10 @@ let
     # because then when things go wrong i have an actual shot at bisecting.
     # this has been useful as recently as 2024/08 when sway/wlroots updates straight up don't render output:
     # <https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4715#note_2523517>
-    #
-    # TODO(2025-01-19): nixpkgs-wayland.sway-unwrapped DOES NOT BUILD; re-enable this once it does.
-    # inherit (pkgs.nixpkgs-wayland)
-    #   sway-unwrapped
-    #   wlroots
-    # ;
+    inherit (pkgs.nixpkgs-wayland)
+      sway-unwrapped
+      wlroots
+    ;
   };
   cfg = config.sane.programs.sway;
   enableXWayland = config.sane.programs.xwayland.enabled;
@@ -45,7 +43,7 @@ let
       passthru.sway-unwrapped = configuredSway;
     };
 
-  wlroots = (pkgs'.wlroots_0_18.override {
+  wlroots = (pkgs'.wlroots.override {
     # wlroots seems to launch Xwayland itself, and i can't easily just do that myself externally.
     # so in order for the Xwayland it launches to be sandboxed, i need to patch the sandboxed version in here.
     xwayland = config.sane.programs.xwayland.package;
@@ -179,6 +177,7 @@ in
       "seatd"
       # "splatmoji"  # used by sway config
       "sway-contrib.grimshot"  # used by sway config
+      "swaybg"  # required for setting the background
       "swayidle"  # enable if you need it
       "swaynotificationcenter"  # notification daemon
       "switchboard"  # network/bluetooth/sound control panel