Index: kwin-5.15.5/xwl/xwayland.cpp
===================================================================
--- kwin-5.15.5.orig/xwl/xwayland.cpp
+++ kwin-5.15.5/xwl/xwayland.cpp
@@ -143,7 +143,7 @@ void Xwayland::init()
 
     m_xwaylandProcess = new Process(this);
     m_xwaylandProcess->setProcessChannelMode(QProcess::ForwardedErrorChannel);
-    m_xwaylandProcess->setProgram(QStringLiteral("Xwayland"));
+    m_xwaylandProcess->setProgram(QLatin1String(NIXPKGS_XWAYLAND));
     QProcessEnvironment env = m_app->processStartupEnvironment();
     env.insert("WAYLAND_SOCKET", QByteArray::number(wlfd));
     env.insert("EGL_PLATFORM", QByteArrayLiteral("DRM"));