these 2 derivations will be built:
  /nix/store/rdfs387igfcq4mf3dvv0wqkjva5lw53a-beads-viewer-0.25.2.drv
  /nix/store/yczz8bx2llj41vq70jnpa8vjvp00ycnc-check-beads-viewer.drv