this derivation will be built:
  /nix/store/fd21pzjz32jjcb5vgnmdypi0jnzxcc9x-inputDerivation-effect-docs.drv
building '/nix/store/fd21pzjz32jjcb5vgnmdypi0jnzxcc9x-inputDerivation-effect-docs.drv'...