these 3 derivations will be built:
  /nix/store/cmyy2nfdnvijlxmdxrwvvn5p5w1bv8dp-source.drv
  /nix/store/3v2m5yiswjzvpida7yizbjc8dba2cdi3-harmonia-deps-3.2.0.drv
  /nix/store/8y17h7wvx9n10k1ik1mm8gyz7x0h9nx1-harmonia-3.2.0.drv