this derivation will be built:
  /nix/store/mncvr9cxdksgs4bwhnd27kcj6y6k84jc-inputDerivation-effect-docs.drv
building '/nix/store/mncvr9cxdksgs4bwhnd27kcj6y6k84jc-inputDerivation-effect-docs.drv'...