this derivation will be built:
  /nix/store/rnn9j65fqsrc720j8kzgdpnb4fxzzhdj-inputDerivation-effect-docs.drv
building '/nix/store/rnn9j65fqsrc720j8kzgdpnb4fxzzhdj-inputDerivation-effect-docs.drv'...