Only pass the XDG_APPS_INSTALL_DIR through #define and compute full desktop file path at runtime
 endif(WIN32)
 
 if(INDICATEQT_FOUND)
-  if(WANT_QTCLIENT)
-    set(DESKTOP_FILE ${XDG_APPS_INSTALL_DIR}/quasselclient.desktop)
-  endif(WANT_QTCLIENT)
-  if(WANT_MONO)
-    set(DESKTOP_FILE ${XDG_APPS_INSTALL_DIR}/quassel.desktop)
-  endif(WANT_MONO)
-  add_definitions(-DDESKTOP_FILE=${DESKTOP_FILE})
+  add_definitions(-DXDG_APPS_INSTALL_DIR=${XDG_APPS_INSTALL_DIR})
 endif(INDICATEQT_FOUND)
 
 # We need to create a version.gen
 
 
   _server = QIndicate::Server::defaultInstance();
   _server->setType("message.irc");
-  _server->setDesktopFile(XSTR(DESKTOP_FILE));
+  QString desktopFile = QString("%1/%2.desktop")
+    .arg(XSTR(XDG_APPS_INSTALL_DIR))
+    .arg(QCoreApplication::applicationFilePath().section('/', -1));
+  _server->setDesktopFile(desktopFile);
   connect(_server, SIGNAL(serverDisplay()), QtUi::mainWindow(), SLOT(forceActivated()));
 
   if (_enabled) {