anchor.diff:      ++ optional gtkSupport "--enable-gtk"
       ++ optional xenSupport "--enable-xen"
       ++ optional openGLSupport "--enable-opengl"
  -    ++ optional virglSupport "--enable-virglrenderer";
  +    ++ optional virglSupport "--enable-virglrenderer"
  +    ++ optional smbdSupport "--smbd=${samba}/bin/smbd";
   
     doCheck = false; # tries to access /dev
   
  
positive.code: , xenSupport ? false, xen
  , openGLSupport ? sdlSupport, mesa_noglu, epoxy, libdrm
  , virglSupport ? openGLSupport, virglrenderer
  , hostCpuOnly ? false
  , nixosTestRunner ? false
  }:
  
negative.code:   '';
  
    configureFlags =
      [ "--audio-drv-list=${audio}"
        "--sysconfdir=/etc"
        "--localstatedir=/var"
      ]
  