these 2 derivations will be built:
  /nix/store/4wjxz0rbw0kjpi7j43c6lcqb532s04k2-closure-info.drv
  /nix/store/n2a4yjdm88w6hyvgnmw7nqp48jh213bv-check-vars.drv
error: path '/nix/store/pyy9ga6l8mx34kbfskl0pm76xy0dcg27-check-vars' is not valid
error: Cannot build '/nix/store/n2a4yjdm88w6hyvgnmw7nqp48jh213bv-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/pyy9ga6l8mx34kbfskl0pm76xy0dcg27-check-vars