diff --git a/ansible/roles/profile_desktop_common/tasks/main.yml b/ansible/roles/profile_desktop_common/tasks/main.yml
index 91b0d24..fc50967 100644
--- a/ansible/roles/profile_desktop_common/tasks/main.yml
+++ b/ansible/roles/profile_desktop_common/tasks/main.yml
@@ -434,6 +434,18 @@
     - "{{ user_home }}/Maildir/iCloudAccount"
     - "{{ user_home }}/Maildir/ProtonMailAccount"
 
+- name: Make Qt apps follow the GTK theme
+  tags: [theme]
+  ansible.builtin.copy:
+    dest: /etc/profile.d/10-qt-theme.sh
+    content: |
+      # Use the gtk3 Qt platform theme so Qt5/Qt6 widgets, file dialogs,
+      # icon theme and color scheme follow ~/.config/gtk-3.0/settings.ini.
+      export QT_QPA_PLATFORMTHEME=gtk3
+    owner: root
+    group: root
+    mode: "0644"
+
 - name: Ensure flathub remote is configured
   tags: [packages]
   community.general.flatpak_remote:
diff --git a/dotfiles/nymph/.config/sway/session-env b/dotfiles/nymph/.config/sway/session-env
index 4a16e3a..c1c85f7 100644
--- a/dotfiles/nymph/.config/sway/session-env
+++ b/dotfiles/nymph/.config/sway/session-env
@@ -1,6 +1,5 @@
 export LIBVA_DRIVER_NAME=iHD
 export QT_QPA_PLATFORM=wayland
-export QT_QPA_PLATFORMTHEME=qt6ct
 export SWAY_UNSUPPORTED_GPU=1
 export WLR_DRM_DEVICES=/dev/dri/card0:/dev/dri/card1
 export WLR_NO_HARDWARE_CURSORS=1