these 2 derivations will be built:
  /nix/store/lw6iabc6c30vf18k5kz3mr4kawaypp2d-closure-info.drv
  /nix/store/a48a0vjc3943fjkq15fg05lljrn53sz7-check-vars.drv
error: path '/nix/store/ppv62gwrshzas14q3ap0g1i1xbdnd2bs-check-vars' is not valid
error: Cannot build '/nix/store/a48a0vjc3943fjkq15fg05lljrn53sz7-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ppv62gwrshzas14q3ap0g1i1xbdnd2bs-check-vars