these 2 derivations will be built:
  /nix/store/yn2rq0f37ps414y2a626syzmkylmm79a-closure-info.drv
  /nix/store/4irwfq4k38hnm9s8sqkyi9waffiir7wf-check-vars.drv
error: path '/nix/store/96n8l5mfl9ad444mafsyjww83dswcmzg-check-vars' is not valid
error: Cannot build '/nix/store/4irwfq4k38hnm9s8sqkyi9waffiir7wf-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/96n8l5mfl9ad444mafsyjww83dswcmzg-check-vars