these 2 derivations will be built:
  /nix/store/k09yavhggk7z2scr5iiqgw7j090k5h5q-closure-info.drv
  /nix/store/9vg4ckygk2p4ph3xzzl1j5pkiwmy4jdl-check-vars.drv
error: path '/nix/store/k724xl5swmr436w4vg0jyadksydl2zy9-check-vars' is not valid
error: Cannot build '/nix/store/9vg4ckygk2p4ph3xzzl1j5pkiwmy4jdl-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/k724xl5swmr436w4vg0jyadksydl2zy9-check-vars