qrc:/qt/qml/dev/lorendb/kaon/qml/Main.qml: module "kvantum" is not installed

[ang3lo-azevedo]

❯ kaon
[2026-01-16T01:26:57] [default] info: This log only represents the most recent run of Kaon!
[2026-01-16T01:26:57] [steam] info: Found Steam: "/home/ang3lo/.steam/steam"
[2026-01-16T01:26:57] [heroic] info: Heroic not found
[2026-01-16T01:26:57] [itch] info: Itch not found
[2026-01-16T01:26:57] [default] warning: QQmlApplicationEngine failed to load component
[2026-01-16T01:26:57] [default] warning: qrc:/qt/qml/dev/lorendb/kaon/qml/Main.qml: module "kvantum" is not installed
[2026-01-16T01:27:01] [portal2vr] warning: "Attempted to activate nonexistent Portal 2 VR"
[2026-01-16T01:27:01] [default] info: Shutting down
[2026-01-16T01:27:01] [vdf] info: Dumping app info to "/home/ang3lo/.cache/LorenDB/Kaon/appinfo/"

[Patola]

(I'm not a developer)

kvantum is a "SVG-based theme engine for Qt6 (including config tool and extra themes)", should be part of KDE. Maybe you don't have it installed because you use other window manager? In this case, telling your data (e.g. distro, libraries, desktop environment) might help.

[ang3lo-azevedo]

I'm using:

• OS: NixOS 26.05 (Yarara) x86_64
• Kernel: Linux 6.18.5-cachyos-lto
• WM: mango (Wayland)
• Theme: Base16Kvantum [Qt], adw-gtk3 [GTK2/3/4]

[coolGi69]

Also see nix-community/nixpkgs-xr#612