nixpkgs/pkgs/desktops/plasma-5/kwin/xwayland.patch

Index: kwin-5.7.3/main_wayland.cpp
===================================================================
--- kwin-5.7.3.orig/main_wayland.cpp
+++ kwin-5.7.3/main_wayland.cpp
@@ -315,7 +315,7 @@ void ApplicationWayland::startXwaylandSe
 
     m_xwaylandProcess = new Process(kwinApp());
     m_xwaylandProcess->setProcessChannelMode(QProcess::ForwardedErrorChannel);
-    m_xwaylandProcess->setProgram(QStringLiteral("Xwayland"));
+    m_xwaylandProcess->setProgram(QLatin1String(NIXPKGS_XWAYLAND));
     QProcessEnvironment env = m_environment;
     env.insert("WAYLAND_SOCKET", QByteArray::number(wlfd));
     m_xwaylandProcess->setProcessEnvironment(env);