these 2 derivations will be built:
  /nix/store/jq0znzfpswlap3lyabvy4lkc9bjc7r1a-closure-info.drv
  /nix/store/vbhdzcra5m7f7n49gy00gfkgyd743s64-check-vars.drv
error: path '/nix/store/dd23nv6r0by1lcd8s1zzyy4mmn6icm89-check-vars' is not valid
error: Cannot build '/nix/store/vbhdzcra5m7f7n49gy00gfkgyd743s64-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/dd23nv6r0by1lcd8s1zzyy4mmn6icm89-check-vars