these 2 derivations will be built:
  /nix/store/k2blkh8v3m4ji4fpybmlhk6xmshywwvd-closure-info.drv
  /nix/store/yclz8gvrrbqvaryc04z2xgcgq32gyrkh-check-vars.drv
error: path '/nix/store/3j6issy9dpb8an8fdwjg4h3i7kkz3k5k-check-vars' is not valid
error: Cannot build '/nix/store/yclz8gvrrbqvaryc04z2xgcgq32gyrkh-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/3j6issy9dpb8an8fdwjg4h3i7kkz3k5k-check-vars