these 2 derivations will be built:
  /nix/store/rsasflwgz6jzz39gmb35qvwk87qg63hn-closure-info.drv
  /nix/store/7ja1jfl9gplb5snpf7r09y3dpp5y16h3-check-vars.drv
error: path '/nix/store/ls8fk74dd2szrifcdv60n5svixcfkvxx-check-vars' is not valid
error: Cannot build '/nix/store/7ja1jfl9gplb5snpf7r09y3dpp5y16h3-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ls8fk74dd2szrifcdv60n5svixcfkvxx-check-vars