these 2 derivations will be built:
  /nix/store/fyx0vb1mbhnjymn8p24yc69f6595sf8k-VistaFont_CHT.EXE.drv
  /nix/store/d2p5xkbav396xfw73blqcbhqnl9kpi7g-vista-fonts-cht-1.drv