these 2 derivations will be built:
  /nix/store/39fl5v5x0lscmlc7n6kms9ca5rqypd4a-closure-info.drv
  /nix/store/vz6lhq9azfdj8nfds9ln9dyzidf5kzah-check-vars.drv
error: path '/nix/store/vif91mvi4jawlfhjwhkymy83kr8amah7-check-vars' is not valid
error: Cannot build '/nix/store/vz6lhq9azfdj8nfds9ln9dyzidf5kzah-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/vif91mvi4jawlfhjwhkymy83kr8amah7-check-vars