anchor.diff:  , xf86vidmodeproto
   , xorg
   , xproto
  +
  +, glesSupport ? false
   }:
   
   let
  
positive.code: 
    cmakeFlags = [
      "-DFREEGLUT_BUILD_DEMOS=OFF"
      # FIXME: is glesv1 or glesv2?
      "-DFREEGLUT_GLES=${boolOn (
        opengl-dummy.egl
        && opengl-dummy.glesv1
        && opengl-dummy.glesv2)}"
    ];
  
negative.code:   ];
  
    buildInputs = [
      glu
      inputproto
      libx11
      xorg.libXi
  