these 2 derivations will be built:
  /nix/store/5zbyfw1d793snp4hpzbmw172ai0pq6xx-closure-info.drv
  /nix/store/h6aaj2cd91bq92cha4v9x5gsqabvmcgg-check-vars.drv
error: path '/nix/store/big96xqmkyn7b22f9y0xrs0qvcr5z7ga-check-vars' is not valid
error: Cannot build '/nix/store/h6aaj2cd91bq92cha4v9x5gsqabvmcgg-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/big96xqmkyn7b22f9y0xrs0qvcr5z7ga-check-vars