these 2 derivations will be built:
  /nix/store/mq49i0iwqzf7gmcch4339hanvadsnawn-closure-info.drv
  /nix/store/dmnp2p0i57kmqzs9q5f8kdxhkpxp85yz-check-vars.drv
error: path '/nix/store/vxzalcnyw6g6yaw472mlxnwi8lnpq0pa-check-vars' is not valid
error: Cannot build '/nix/store/dmnp2p0i57kmqzs9q5f8kdxhkpxp85yz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/vxzalcnyw6g6yaw472mlxnwi8lnpq0pa-check-vars