# How to fix qt themes in nixos?

**URL:** https://discourse.nixos.org/t/how-to-fix-qt-themes-in-nixos/14495
**Category:** Help
**Created:** [August 11, 2021, 7:03pm UTC](https://discourse.nixos.org/t/how-to-fix-qt-themes-in-nixos/14495 "2021-08-11T19:03:18Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![m0rtis0](https://discourse.nixos.org/user_avatar/discourse.nixos.org/m0rtis0/32/6914_2.png) [@m0rtis0](https://discourse.nixos.org/u/m0rtis0)
#### Post date: [July 22, 2022, 4:50pm UTC](https://discourse.nixos.org/t/how-to-fix-qt-themes-in-nixos/14495/5 "2022-07-22T16:50:07Z")

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This is no longer working as of Nixos 22,  
somehow the QT styles are now hardcoded into the module:

```auto
building Nix...
building the system configuration...
error: The option `environment.variables.QT_QPA_PLATFORMTHEME' has conflicting definition values:
       - In `/etc/nixos/configuration.nix': "qt5ct"
       - In `/nix/var/nix/profiles/per-user/root/channels/nixos/nixos/modules/config/qt5.nix': "gnome"
(use '--show-trace' to show detailed location information)

```

```auto
  environment.variables = {
    QT_QPA_PLATFORMTHEME = "qt5ct";
  };

```

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_[View the full topic](https://discourse.nixos.org/t/how-to-fix-qt-themes-in-nixos/14495)._