these 2 derivations will be built:
  /nix/store/iwnzac8w7dm58ir5n34z06r003r1s0p3-closure-info.drv
  /nix/store/9hqqh38h3s0w802m2hkr8s01v6jc5422-check-vars.drv
error: path '/nix/store/a6jawy86pvbynzfsxixchfs724kxc8bc-check-vars' is not valid
error: Cannot build '/nix/store/9hqqh38h3s0w802m2hkr8s01v6jc5422-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/a6jawy86pvbynzfsxixchfs724kxc8bc-check-vars