these 2 derivations will be built:
  /nix/store/kdqi5rl5k6p5mqab7a9l7xqk1y979bq0-closure-info.drv
  /nix/store/kw9qrzgpif54s4q37jzz9mcjdxrzpyz7-check-vars.drv
error: path '/nix/store/8n6g8hqfb38rxnw66i3gzimdbzb64c1n-check-vars' is not valid
error: Cannot build '/nix/store/kw9qrzgpif54s4q37jzz9mcjdxrzpyz7-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/8n6g8hqfb38rxnw66i3gzimdbzb64c1n-check-vars