these 5 derivations will be built:
  /nix/store/j295ms1hdybpps884xq7awlkls1x60gn-clan-runtime.drv
  /nix/store/6xxsw6l9qmf7rdhys45pjd4759k8236q-clan-cli-source.drv
  /nix/store/7mv6hmqddfcz5ng9jz12sa8y1j5k5h7a-clan-cli.drv
  /nix/store/8ivyn1ilfl6wvlvijsk9nfnj5x4ahkp0-closure-info.drv
  /nix/store/yiv58i4ddlpq70m1p7sc7n1i2b0j4kcy-check-vars.drv