these 2 derivations will be built:
  /nix/store/30kyiyg8j777kqlw3n57a0ywlhrdnd3l-closure-info.drv
  /nix/store/pkzjjvadsfhdrvbvwfbpj808xhnzw80g-check-vars.drv
error: path '/nix/store/pjqnk34bd8qppbr5y1lyn4w7hmislpva-check-vars' is not valid
error: Cannot build '/nix/store/pkzjjvadsfhdrvbvwfbpj808xhnzw80g-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/pjqnk34bd8qppbr5y1lyn4w7hmislpva-check-vars