diff --git a/nixos/modules/services/desktop-managers/lomiri.nix b/nixos/modules/services/desktop-managers/lomiri.nix
index 57b38f81f0f3..364acd2dfde2 100644
--- a/nixos/modules/services/desktop-managers/lomiri.nix
+++ b/nixos/modules/services/desktop-managers/lomiri.nix
@@ -7,6 +7,9 @@
 
 let
   cfg = config.services.desktopManager.lomiri;
+  nixos-gsettings-overrides = pkgs.lomiri.lomiri-gsettings-overrides.override {
+    inherit (cfg) extraGSettingsOverrides extraGSettingsOverridePackages;
+  };
 in
 {
   options.services.desktopManager.lomiri = {
@@ -22,6 +25,18 @@ in
       type = lib.types.bool;
       default = config.services.xserver.displayManager.lightdm.greeters.lomiri.enable || cfg.enable;
     };
+
+    extraGSettingsOverrides = lib.mkOption {
+      description = "Additional GSettings overrides.";
+      type = lib.types.lines;
+      default = "";
+    };
+
+    extraGSettingsOverridePackages = lib.mkOption {
+      description = "List of packages for which GSettings are overridden.";
+      type = lib.types.listOf lib.types.path;
+      default = [ ];
+    };
   };
 
   config = lib.mkMerge [
@@ -43,10 +58,17 @@ in
           "/share/wallpapers"
         ];
 
-        systemPackages = with pkgs.lomiri; [
-          lomiri-wallpapers # default + additional wallpaper
-          suru-icon-theme # basic indicator icons
-        ];
+        # Override GSettings defaults
+        sessionVariables.NIX_GSETTINGS_OVERRIDES_DIR = "${nixos-gsettings-overrides}/share/gsettings-schemas/nixos-gsettings-overrides/glib-2.0/schemas";
+
+        systemPackages =
+          [
+            nixos-gsettings-overrides # GSettings default overrides
+          ]
+          ++ (with pkgs.lomiri; [
+            lomiri-wallpapers # default + additional wallpaper
+            suru-icon-theme # basic indicator icons
+          ]);
       };
 
       fonts.packages = with pkgs; [
diff --git a/pkgs/desktops/lomiri/data/lomiri-gsettings-overrides/default.nix b/pkgs/desktops/lomiri/data/lomiri-gsettings-overrides/default.nix
new file mode 100644
index 000000000000..672c7adbeb8b
--- /dev/null
+++ b/pkgs/desktops/lomiri/data/lomiri-gsettings-overrides/default.nix
@@ -0,0 +1,51 @@
+{
+  lib,
+  runCommand,
+  glib,
+  lomiri-schemas,
+  lomiri-wallpapers,
+  nixos-icons,
+  writeText,
+  extraGSettingsOverrides ? "",
+  extraGSettingsOverridePackages ? [ ],
+  nixos-artwork,
+}:
+
+let
+  # Overriding the background picture should be possible, but breaks within the VM tests.
+  # It results in either a grey background (prolly indicating an error somewhere)
+  # or hangs the session (also happens when using LSS, which sets it via AccountsService).
+  #
+  # So we can only override the launcher button details.
+  # Button colour: https://github.com/NixOS/nixos-artwork/blob/51a27e4a011e95cb559e37d32c44cf89b50f5154/logo/README.md#colours
+  gsettingsOverrides = writeText "lomiri-gschema-overrides" ''
+    [com.lomiri.Shell.Launcher]
+    logo-picture-uri='file://${nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake-white.svg'
+    home-button-background-color='#5277C3'
+
+    ${extraGSettingsOverrides}
+  '';
+
+  gsettingsOverridePackages = [
+    lomiri-schemas
+  ] ++ extraGSettingsOverridePackages;
+in
+runCommand "lomiri-gsettings-overrides" { preferLocalBuild = true; } ''
+  dataDir="$out/share/gsettings-schemas/nixos-gsettings-overrides"
+  schemaDir="$dataDir/glib-2.0/schemas"
+  mkdir -p "$schemaDir"
+
+  ${lib.strings.concatMapStringsSep "\n" (
+    pkg:
+    "cp -rf \"${glib.getSchemaPath pkg}\"/*.xml \"${glib.getSchemaPath pkg}\"/*.gschema.override \"$schemaDir\""
+  ) gsettingsOverridePackages}
+
+  chmod -R a+w "$dataDir"
+  cp --no-preserve=mode "${gsettingsOverrides}" "$schemaDir/zz-nixos-defaults.gschema.override"
+
+  ${lib.getExe' glib.dev "glib-compile-schemas"} --strict "$schemaDir" | tee gcs.log
+
+  if grep 'No schema files found' gcs.log >/dev/null; then
+    exit 1
+  fi
+''
diff --git a/pkgs/desktops/lomiri/default.nix b/pkgs/desktops/lomiri/default.nix
index 893165171bb5..fbcb046f2caa 100644
--- a/pkgs/desktops/lomiri/default.nix
+++ b/pkgs/desktops/lomiri/default.nix
@@ -31,6 +31,7 @@ let
       teleports = callPackage ./applications/teleports { };
 
       #### Data
+      lomiri-gsettings-overrides = callPackage ./data/lomiri-gsettings-overrides { };
       lomiri-schemas = callPackage ./data/lomiri-schemas { };
       lomiri-session = callPackage ./data/lomiri-session { };
       lomiri-sounds = callPackage ./data/lomiri-sounds { };