these 2 derivations will be built:
  /nix/store/cfdnlvj3zr4s5glmrfpf3j33x4yz2w8d-fabro-0.304.0-nightly.1-vendor.drv
  /nix/store/an70k5f889nii2nbqfyb6811phxkb63k-fabro-0.304.0-nightly.1.drv