From d21cc02fe1eb77cf5c78aa774b320f1af09a79bc Mon Sep 17 00:00:00 2001
From: Guillaume Fournier <me@guif.dev>
Date: Sat, 17 Oct 2026 10:21:32 +0200
Subject: [PATCH] qlcplus: add versionCheckHook

---
 pkgs/by-name/ql/qlcplus/package.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/by-name/ql/qlcplus/package.nix b/pkgs/by-name/ql/qlcplus/package.nix
index 4998ca0d8a63..d07c2895202c 100644
--- a/pkgs/by-name/ql/qlcplus/package.nix
+++ b/pkgs/by-name/ql/qlcplus/package.nix
@@ -15,6 +15,7 @@
   libsndfile,
   fftw,
   libgpiod,
+  versionCheckHook,
   nix-update-script,
 }:
 
@@ -92,6 +93,12 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   doInstallCheck = true;
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  # The QApplication needs a platform even to print --version
+  preVersionCheck = ''
+    export QT_QPA_PLATFORM=offscreen
+  '';
+  versionCheckKeepEnvironment = [ "QT_QPA_PLATFORM" ];
 
   passthru.updateScript = nix-update-script {
     # Tags look like QLC+_5.3.0