these 2 derivations will be built:
  /nix/store/kp1hjg00pqgi1lw8dsf3w3rwh9g1z3qi-muse-code-1.4.20-R8619.1.drv
  /nix/store/addn0hcwnkll9x2m7k074imiz6ickl4c-check-muse-code.drv