diff --git a/.config/gtk-3.0/settings.ini.cgt b/.config/gtk-3.0/settings.ini.cgt
index 6719dc3..d41523f 100644
--- a/.config/gtk-3.0/settings.ini.cgt
+++ b/.config/gtk-3.0/settings.ini.cgt
@@ -1,5 +1,5 @@
 [Settings]
-gtk-theme-name=Catppuccin-Mocha-Standard-Red-Dark
+gtk-theme-name=<% opt.gtk_theme %>
 gtk-icon-theme-name=<% opt.icon_theme %>
 gtk-font-name=<% opt.font %> 11
 gtk-cursor-theme-name=<% opt.cursor.theme %>
diff --git a/.config/gtk-4.0/settings.ini.cgt b/.config/gtk-4.0/settings.ini.cgt
index 842d57b..e6bce18 100644
--- a/.config/gtk-4.0/settings.ini.cgt
+++ b/.config/gtk-4.0/settings.ini.cgt
@@ -1,5 +1,5 @@
 [Settings]
-gtk-theme-name=Catppuccin-Mocha-Standard-Red-Dark
+gtk-theme-name=<% opt.gtk_theme %>
 gtk-icon-theme-name=<% opt.icon_theme %>
 gtk-font-name=<% opt.font %> 11
 gtk-cursor-theme-name=<% opt.cursor.theme %>
diff --git a/.gtkrc-2.0.cgt b/.gtkrc-2.0.cgt
index f2a91ef..248368d 100644
--- a/.gtkrc-2.0.cgt
+++ b/.gtkrc-2.0.cgt
@@ -1,3 +1,3 @@
 gtk-icon-theme-name="<% opt.icon_theme %>"
 gtk-cursor-theme-name="<% opt.cursor.theme %>"
-gtk-theme-name="Catppuccin-Mocha-Standard-Red-Dark"
+gtk-theme-name="<% opt.gtk_theme %>"
diff --git a/cg_opts.lua b/cg_opts.lua
index 03d49b6..70527e1 100644
--- a/cg_opts.lua
+++ b/cg_opts.lua
@@ -19,6 +19,7 @@ opts.cursor = {
     size = 24,
 }
 
+opts.gtk_theme = "Catppuccin-Mocha-Standard-Red-dark"
 opts.icon_theme = "candy-icons"
 
 opts.commands = {
diff --git a/scripts/mzteinit/build.zig b/scripts/mzteinit/build.zig
index 9c2d81e..822a34c 100644
--- a/scripts/mzteinit/build.zig
+++ b/scripts/mzteinit/build.zig
@@ -1,6 +1,7 @@
 const std = @import("std");
+const common = @import("build_common.zig");
 
-pub fn build(b: *std.build.Builder) void {
+pub fn build(b: *std.build.Builder) !void {
     const target = b.standardTargetOptions(.{});
     const mode = b.standardOptimizeOption(.{});
 
@@ -15,6 +16,14 @@ pub fn build(b: *std.build.Builder) void {
 
     exe.addModule("ansi-term", b.dependency("ansi_term", .{}).module("ansi-term"));
 
+    const cg_opt = try common.confgenGet(struct {
+        gtk_theme: []const u8,
+    }, "../..", b.allocator);
+
+    const opts = b.addOptions();
+    opts.addOption([]const u8, "gtk_theme", cg_opt.gtk_theme);
+    exe.addOptions("opts", opts);
+
     b.installArtifact(exe);
 
     const run_cmd = b.addRunArtifact(exe);
diff --git a/scripts/mzteinit/build_common.zig b/scripts/mzteinit/build_common.zig
new file mode 120000
index 0000000..821d564
--- /dev/null
+++ b/scripts/mzteinit/build_common.zig
@@ -0,0 +1 @@
+../../build_common.zig
\ No newline at end of file
diff --git a/scripts/mzteinit/src/env.zig b/scripts/mzteinit/src/env.zig
index 35ae4b8..4ae5b97 100644
--- a/scripts/mzteinit/src/env.zig
+++ b/scripts/mzteinit/src/env.zig
@@ -69,7 +69,7 @@ pub fn populateEnvironment(env: *std.process.EnvMap) !bool {
     // GUI options
     {
         try env.put("QT_QPA_PLATFORMTHEME", "qt5ct");
-        try env.put("GTK_THEME", "Catppuccin-Mocha-Standard-Red-Dark");
+        try env.put("GTK_THEME", @import("opts").gtk_theme); // gtk theme from confgen
 
         // use xdg-desktop-portal
         try env.put("GTK_USE_PORTAL", "1");
diff --git a/scripts/startriver.sh b/scripts/startriver.sh
index 1937bf5..eedfc11 100755
--- a/scripts/startriver.sh
+++ b/scripts/startriver.sh
@@ -10,9 +10,4 @@ export QT_QPA_PLATFORM="wayland"
 # this is necessary for tray icons
 export XDG_CURRENT_DESKTOP="river"
 
-# theming
-export GTK_THEME=Catppuccin-Mocha-Standard-Red-Dark
-export QT_QPA_PLATFORMTHEME=gtk2
-export _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=on -Dswing.aatext=true -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Dswing.crossplatformlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel'
-
 exec river