these 2 derivations will be built:
  /nix/store/a1b874q23nyzh1h91f2jnrq9b8klh6r8-closure-info.drv
  /nix/store/3k4fjpkjnk52lfrm79spk1czpzsy5rrn-check-vars.drv
error: path '/nix/store/i29r1f95imffaqb7fnbhw59zhk79axhz-check-vars' is not valid
error: Cannot build '/nix/store/3k4fjpkjnk52lfrm79spk1czpzsy5rrn-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/i29r1f95imffaqb7fnbhw59zhk79axhz-check-vars