these 4 derivations will be built:
  /nix/store/0ygdfarz1bsndfhmr345h3dvqpx1551s-src.drv
  /nix/store/sp97gwip1l17xmrrxaq4r6m3r0sp6gv3-nix-uci-0.0.1.drv
  /nix/store/xqv1lgq2xccyqanbncqjcxlc7p2sn15z-uci.json.drv
  /nix/store/qyfsanvhg1qbbhs0lnck5ydcbfr5gzzw-uci-commands.drv