modules/gtk: Migrate to by-name and use stable pkgs for themes

The themes are no longer in unstable, but I believe they might get added
again.

3 files changed, 82 insertions, 68 deletions

diff --git a/modules/by-name/gt/gtk/module.nix b/modules/by-name/gt/gtk/module.nix
new file mode 100644
index 00000000..44442077
--- /dev/null
+++ b/modules/by-name/gt/gtk/module.nix
@@ -0,0 +1,82 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{
+  config,
+  pkgs,
+  lib,
+  packageSets,
+  libraries,
+  ...
+}: let
+  cfg = config.soispha.gtk;
+
+  homeConfig = config.home-manager.users.soispha;
+in {
+  options.soispha.gtk = {
+    enable = libraries.base.options.mkEnable "gtk themes";
+  };
+
+  config.home-manager.users.soispha = lib.mkIf cfg.enable {
+    gtk = {
+      enable = true;
+      theme = {
+        # NOTE: The `nordic` package pulls the whole plasma shell, to copy some stuff from a plasma theme :/ <2026-05-29>
+        # NOTE: Unstable removed the nordic theme, as it also supported gtk2, which is
+        # insecure. So we use stable until unstable adds it again. <2026-08-13>
+        package = packageSets.stable.nordic;
+        name = "Nordic";
+      };
+      cursorTheme = {
+        package = pkgs.nordzy-cursor-theme;
+        name = "Nordzy-cursors";
+      };
+      iconTheme = {
+        package = pkgs.nordzy-icon-theme;
+        name = "Nordzy-icon";
+      };
+      font = {
+        name = "Noto Sans";
+        size = 10;
+      };
+      gtk2 = {
+        configLocation = "${homeConfig.xdg.configHome}/gtk-2.0/gtkrc";
+        #      extraConfig = ''
+        #        gtk-enable-animations=1
+        #        gtk-primary-button-warps-slider=0
+        #        gtk-toolbar-style=3
+        #        gtk-menu-images=1
+        #        gtk-button-images=1
+        #
+        #      '';
+      };
+      gtk3 = {
+        # extraConfig = ''
+        #        gtk-button-images=true
+        #        gtk-decoration-layout=icon:minimize,maximize,close
+        #        gtk-enable-animations=true
+        #        gtk-menu-images=true
+        #        gtk-primary-button-warps-slider=false
+        #        gtk-toolbar-style=3
+        #        #gtk-modules=window-decorations-gtk-module:colorreload-gtk-module
+        #      '';
+        extraCss = "";
+      };
+      gtk4 = {
+        theme = homeConfig.gtk.theme;
+        #      extraConfig = ''
+        #        gtk-application-prefer-dark-theme=true
+        #        gtk-decoration-layout=icon:minimize,maximize,close
+        #        gtk-enable-animations=true
+        #        gtk-primary-button-warps-slider=false
+        #      '';
+      };
+    };
+  };
+}
diff --git a/modules/home.legacy/conf/default.nix b/modules/home.legacy/conf/default.nix
index b50068ea..9af67102 100644
--- a/modules/home.legacy/conf/default.nix
+++ b/modules/home.legacy/conf/default.nix
@@ -13,7 +13,6 @@
     ./btop
     ./dconf
     ./gammastep
-    ./gtk
     ./himalaya
     ./keepassxc
     ./mail
diff --git a/modules/home.legacy/conf/gtk/default.nix b/modules/home.legacy/conf/gtk/default.nix
deleted file mode 100644
index e624765b..00000000
--- a/modules/home.legacy/conf/gtk/default.nix
+++ /dev/null
@@ -1,67 +0,0 @@
-# nixos-config - My current NixOS configuration
-#
-# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
-# SPDX-License-Identifier: GPL-3.0-or-later
-#
-# This file is part of my nixos-config.
-#
-# You should have received a copy of the License along with this program.
-# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
-{
-  config,
-  pkgs,
-  ...
-}: {
-  gtk = {
-    enable = true;
-    theme = {
-      # NOTE: The `nordic` package pulls the whole plasma shell, to copy some stuff from a plasma theme :/ <2026-05-29>
-      package = pkgs.nordic;
-      name = "Nordic";
-    };
-    cursorTheme = {
-      package = pkgs.nordzy-cursor-theme;
-      name = "Nordzy-cursors";
-    };
-    iconTheme = {
-      package = pkgs.nordzy-icon-theme;
-      name = "Nordzy-icon";
-    };
-    font = {
-      name = "Noto Sans";
-      size = 10;
-    };
-    gtk2 = {
-      configLocation = "${config.xdg.configHome}/gtk-2.0/gtkrc";
-      #      extraConfig = ''
-      #        gtk-enable-animations=1
-      #        gtk-primary-button-warps-slider=0
-      #        gtk-toolbar-style=3
-      #        gtk-menu-images=1
-      #        gtk-button-images=1
-      #
-      #      '';
-    };
-    gtk3 = {
-      # extraConfig = ''
-      #        gtk-button-images=true
-      #        gtk-decoration-layout=icon:minimize,maximize,close
-      #        gtk-enable-animations=true
-      #        gtk-menu-images=true
-      #        gtk-primary-button-warps-slider=false
-      #        gtk-toolbar-style=3
-      #        #gtk-modules=window-decorations-gtk-module:colorreload-gtk-module
-      #      '';
-      extraCss = "";
-    };
-    gtk4 = {
-      theme = config.gtk.theme;
-      #      extraConfig = ''
-      #        gtk-application-prefer-dark-theme=true
-      #        gtk-decoration-layout=icon:minimize,maximize,close
-      #        gtk-enable-animations=true
-      #        gtk-primary-button-warps-slider=false
-      #      '';
-    };
-  };
-}