anki-bin: Qt fatal: Cannot mix incompatible Qt library (6.6.2) with this library (6.6.1)

[ElnuDev]

Describe the bug

Anki fails to run with error Qt fatal: Cannot mix incompatible Qt library (6.6.2) with this library (6.6.1). It was giving this error so I decided to update my system to latest nixpkgs, and the error remained.

Notify maintainers

@mahmoudk1000

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[elnu@elnu:~/nix-config]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.8.1, NixOS, 24.05 (Uakari), 24.05.20240321.20f77aa`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.2`
 - channels(root): `"nixos"`
 - nixpkgs: `/nix/store/wa8lhchql76i6czzvad3bqz6lvnjnbr5-source`

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[SuperSandro2000]

Are you mixing different versions of nixpkgs?

[ElnuDev]

I don't believe so. If you want to take a look at my configuration (it's a bit of a mess), it's here. Oh, and I should have tested this before, but I just checked and anki works just fine, this is specific to anki-bin.

[chewblacka]

I tried installing anki-bin and get this error too.

[mahmoudk1000]

I am updating my system to latest Nixpkgs. And going to check it once done.

Edit: bty anki-bin works just fine on my system, which is last update at 26 February.

[lolbinarycat]

unable to replicate when building anki-bin on nixpkgs master (ada65ba)

[chewblacka]

Ok I think I found the culprit. I ran anki-bin under plasma6 and got the same incompatible QT library error as the OP. Then installed and booted into Pantheon instead where it runs fine. So seems to be plasma6 specific.

[lolbinarycat]

ah, makes sense. i'm running plasma5 still.

[mahmoudk1000]

Nice catch. Then I would suppose it will be fixed once Anki 24.04 is released. As then ankitects/anki@f09fbea should be rolled out.

[SuperSandro2000]

if the bin variant is vendoring qt6, then we probably need to unset some envs otherwise things will often break.

[mahmoudk1000]

Anki itself does vendor qt6 version. But the anki-bin package doesn't.

[ElnuDev]

Ok I think I found the culprit. I ran anki-bin under plasma6 and got the same incompatible QT library error as the OP. Then installed and booted into Pantheon instead where it runs fine. So seems to be plasma6 specific.

Forgot to mention that I'm running on X.org with i3

[mahmoudk1000]

Ok I think I found the culprit. I ran anki-bin under plasma6 and got the same incompatible QT library error as the OP. Then installed and booted into Pantheon instead where it runs fine. So seems to be plasma6 specific.

Forgot to mention that I'm running on X.org with i3

I ran into it after updating my system to the latest nixpkgs, despite I don't run Plasma as well.

if the bin variant is vendoring qt6, then we probably need to unset some envs otherwise things will often break.

You were correct. Following your comment, I managed to fix it by unset QT_PLUGIN_PATH under profile arguments.
Is there any further envs, that you recommend unsetting to prevent future breaks?

Thanks!