#8564·lmms

Cannot get Vital linux VST to load on NixOS

Author: aceinetxCreated Sep 18, 2026Updated Sep 18, 2026

Labelsbug

System Information

NixOS 26.05 Linux 7.2.6 Sway (Wayland)

LMMS Version(s)

1.2.2-unstable-2026-04-21 from nixpkgs (26.05)

Most Recent Working Version

No response

Bug Summary

Cannot get Vital to load with carla nor vestige on NixOS, either crashes or fails to load

Expected Behaviour

Vital should load correctly and function as expected

Steps To Reproduce

With vestige

Add the plugin from /run/current-system/sw/lib/vst or /run/current-system/sw/lib/vst3
You should get the following output depending on from which directory the plugin shared library was loaded:

unique ID: Vita
RemotePlugin::DebugMessage: inputs: 0; outputs: 2
RemotePlugin::DebugMessage: creating editor
Error while reading.
Process error:  QProcess::Crashed
Remote plugin crashed
Starting detached.

RemotePlugin::DebugMessage: could not find entry point
QProcess: Destroyed while process ("/nix/store/zn1m90dsgzwglf20ahz9wl459362lyw0-lmms-1.2.2-unstable-2026-04-21/lib/lmms/NativeLinuxRemoteVstPlugin64") is still running.

With carla

Add the following plugin path: /run/current-system/sw/lib/vst3
Add Vital plugin
LMMS freezes for a couple seconds
You should get the following output:

[carla] Trying to start carla-plugin using "/nix/store/7ap6fsppwrz6xp8bphhqf444x1wwbriy-carla-2.5.10/share/carla/resources/carla-plugin"
LRDF Support not available (LADSPA-RDF will be disabled)
Carla 2.5.10 started, status:
  Python version: 3.13.15
  Qt version:     5.15.19
  PyQt version:   5.15.10
  Binary dir:     /nix/store/7ap6fsppwrz6xp8bphhqf444x1wwbriy-carla-2.5.10/lib/carla
  Resources dir:  /nix/store/7ap6fsppwrz6xp8bphhqf444x1wwbriy-carla-2.5.10/share/carla/resources
Frontend pixel ratio is 1.0
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
[1]    15071 segmentation fault (core dumped)  lmms
                                                                    
aceinet-nix git:master*  199s
❯ Got SIGTERM -> Closing now
CarlaPipeCommon::_writeMsgBuffer(..., 8) - failed with -1 (false), message was:
exiting

Logs

No response

Screenshots / Minimum Reproducible Project

No response

Please search the issue tracker for existing bug reports before submitting your own.

I have searched all existing issues and confirmed that this is not a duplicate.

Source: LMMS/lmms

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