Merge branch 'master' into staging-next

Quite many rebuilds from master:
> Estimating rebuild amount by counting changed Hydra jobs.
>    3926 x86_64-darwin
>    4645 x86_64-linux

nixos/modules/services/x11/display-managers/default.nix

@@ -474,6 +474,13 @@ in
             )
             [dms wms]
           );
+
+    # Make xsessions and wayland sessions installed at
+    # /run/current-system/sw/share as some programs
+    # have behavior that depends on them being installed
+    environment.systemPackages = [
+      cfg.displayManager.sessionData.desktops
+    ];
   };
 
   imports = [