these 5 derivations will be built:
  /nix/store/w7n0xkxalbbqx0wxr1gzgk455ccjnnvi-source.drv
  /nix/store/d1rp83d1zk6vwcxgcm1kg7mpbknir6g3-aven-0.1.42-vendor-staging.drv
  /nix/store/nzr33mmzq04vv6hqlsq6v2b1bm583ssk-aven-0.1.42-vendor.drv
  /nix/store/a83lw8jjwsscsrgddvv7wjnx56lnnzxh-aven-0.1.42.drv
  /nix/store/arcbrd6nv94rpll0m77bdnkblscmc742-check-aven.drv