these 2 derivations will be built:
  /nix/store/xc6v9p9lpfl9a7mia071hq99mb231ggk-closure-info.drv
  /nix/store/g8kb8mvmz143g7w3hphnrwj1pg6d5sc1-check-vars.drv
error: path '/nix/store/0z8i23a9i940pdrv6j3wplbdl1qm4jmi-check-vars' is not valid
error: Cannot build '/nix/store/g8kb8mvmz143g7w3hphnrwj1pg6d5sc1-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/0z8i23a9i940pdrv6j3wplbdl1qm4jmi-check-vars