[BUG] Caelestia is overwriting gtk/qt5ct files and breaking dark mode on nixos

[anarion80]

Step 1. Before you submit

• I have read the above instructions and am sure that this is supposed to be posted here.
• I've successfully updated to the latest versions following the updating guide.
• I've successfully updated the system packages to the latest.
• I've ticked the checkboxes without reading their contents

Step 2. Version info

Version info

❯ caelestia -v
Packages: not on Arch

fatal: not a git repository: '/home/anarion/.config/.git'
Caelestia: not installed

Shell: version helper not available

Quickshell: not in PATH

Local copy of shell found:
    Last merged upstream commit: 96942d5ff38698513f0330618073dbdf2af1bd59
    Commit message: sysinfo: allow overriding OS icon (#1091)  * Allow overriding OS icon  Signed-off-by: Dan Griffiths <dgriffiths@widgitlabs.com>  * Support icons and live reloading  Signed-off-by: Dan Griffiths <dgriffiths@widgitlabs.com>  * isDefaultLogo should default to true  Signed-off-by: Dan Griffiths <dgriffiths@widgitlabs.com>  ---------  Signed-off-by: Dan Griffiths <dgriffiths@widgitlabs.com>

    Last commit: 9e4d18bbadf431b4f5777d45cc4919c0df11658d
    Commit message: Merge branch 'pull_upstream' into topbar

Step 3. Describe the issue

I am running NixOS with Caelestia and I am quite happy. Recently though my carefully prepared dark mode for all apps (GTK/QT/XWayland) stopped working. I was using home manager to set ~/.config/qt5ct/qt5ct.conf and ~/.config/qt6ct/qt6ct.conf to this:

[Appearance]
      color_scheme_path=/home/anarion/.config/qt5ct/colors/style-colors.conf
      custom_palette=true
      icon_theme=Papirus-Dark
      standard_dialogs=default
      style=Breeze
      # style=Darkly
      # style=Fusion

      [Fonts]
      fixed="Monospace,12,-1,5,50,0,0,0,0,0,Regular"
      general="Noto Sans,12,-1,5,50,0,0,0,0,0,Regular"

      [Interface]
      activate_item_on_single_click=1
      buttonbox_layout=0
      cursor_flash_time=1000
      dialog_buttons_have_icons=1
      double_click_interval=400
      gui_effects=@Invalid()
      keyboard_scheme=2
      menus_have_icons=true
      show_shortcuts_in_context_menus=true
      stylesheets=@Invalid()
      toolbutton_style=4
      underline_shortcut=1
      wheel_scroll_lines=3

      [SettingsWindow]
      geometry=@ByteArray(\x1\xd9\xd0\xcb\0\x3\0\0\0\0\x5P\0\0\0\0\0\0\xf\xcf\0\0\x4m\0\0\x5P\0\0\0\0\0\0\xf\xcf\0\0\x4m\0\0\0\0\x2\0\0\0\xf\0\0\0\x5P\0\0\0\0\0\0\xf\xcf\0\0\x4m)

      [Troubleshooting]
      force_raster_widgets=1
      ignored_applications=@Invalid()

it works fine after activation, the qt config files are created as symlinks to nix store. But after reboot, the files are gone, replaced by default:

[Appearance]
color_scheme_path=/home/anarion/.config/qt5ct/colors/caelestia.colors
custom_palette=true
icon_theme=Papirus-Dark
standard_dialogs=default
style=Darkly

[Fonts]
fixed="Monospace,12,-1,5,50,0,0,0,0,0"
general="Sans Serif,12,-1,5,50,0,0,0,0,0"

I figured this is caelestia overwriting the file. Unfortunately I can't get caelestia to switch light/dark for everything. Seems like only firefox works in caelestia, but everything else like Thunar, Double Commander stay with light mode.

Is there a way to somehow fix/tweak/configure this?

Logs

<!-- Put your log content here!-->

Reminder

• I agree that it's usually impossible for others to help me without my logs.