this derivation will be built:
  /nix/store/7wl2qkfqfhjg26baxyvg0hjfgy0y3r20-inputDerivation-effect-docs.drv
building '/nix/store/7wl2qkfqfhjg26baxyvg0hjfgy0y3r20-inputDerivation-effect-docs.drv'...