these 2 derivations will be built:
  /nix/store/a8xw9pjgsxkcj9wv6l5pvb3csx4cqwn3-closure-info.drv
  /nix/store/cf21c8k9lxkkff65rrwmgk2v5aaj4mmg-check-vars.drv
error: path '/nix/store/gw0iyiy63y1p9jiyqpnz4r1g6cjj897i-check-vars' is not valid
error: Cannot build '/nix/store/cf21c8k9lxkkff65rrwmgk2v5aaj4mmg-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/gw0iyiy63y1p9jiyqpnz4r1g6cjj897i-check-vars