this derivation will be built:
  /nix/store/4szkbxnsq1ccqab8a2pnxlg7pnr9cn2y-inputDerivation-effect-docs.drv
building '/nix/store/4szkbxnsq1ccqab8a2pnxlg7pnr9cn2y-inputDerivation-effect-docs.drv'...