Want to share howto change gnome login screen on 26.05

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Hi

Want to share my method to change the login screen of gnome version 50 on nixos26.05

You need to have copied your background to /etc/nixos/assets/

Add this line add the end of the configuration file

 nixpkgs.overlays = [
    (final: prev: {
      gnome-shell = prev.gnome-shell.overrideAttrs (old: {
        patches = (old.patches or []) ++ [
          (final.writeText "gdm-bg.patch" ''
            --- a/data/theme/gnome-shell-sass/widgets/_login-lock.scss
            +++ b/data/theme/gnome-shell-sass/widgets/_login-lock.scss
            @@ -15,6 +15,9 @@
             /* Login Dialog */
             .login-dialog {
               background-color: $_gdm_bg;
            +  background-image: url('file:///etc/nixos/assets/login.png');
            +  background-size: cover;
            +  background-position: center;
             }
          '')
        ];
      });
    })
  ];

sudo nixos-rebuild switch

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