these 3 derivations will be built:
  /nix/store/sv67k0n6bgdxl45vc1bgia5mwfyc5rnf-Handy_0.9.8_amd64.deb.drv
  /nix/store/bnspdh32k4b4774a07g4xlbvp3qyy229-handy-0.9.8.drv
  /nix/store/729gf9rb69giwmh5zprzx0dx141nlqqv-check-handy.drv