this derivation will be built:
  /nix/store/mc1ppygr0ln4q4ajv0ns6bqjncw8cg8i-inputDerivation-effect-docs.drv
building '/nix/store/mc1ppygr0ln4q4ajv0ns6bqjncw8cg8i-inputDerivation-effect-docs.drv'...