these 2 derivations will be built:
  /nix/store/9rwr7inhmbgpqsb50prg58knd06xlzm1-closure-info.drv
  /nix/store/9s4bp5xqbwwbkxwb570hjgc6a13gy3vz-check-vars.drv
error: path '/nix/store/7lh5skx1sd1kcqcnzkg2n2hd2im9rkmi-check-vars' is not valid
error: Cannot build '/nix/store/9s4bp5xqbwwbkxwb570hjgc6a13gy3vz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/7lh5skx1sd1kcqcnzkg2n2hd2im9rkmi-check-vars