these 2 derivations will be built:
  /nix/store/ip2nc39w60hpws3v1y552c4wccck46pi-closure-info.drv
  /nix/store/y99w5pf48bn9w60qdm736qlc0vccczvj-check-vars.drv
error: path '/nix/store/87nfmac8k26pz9jqharyzzklz5yy80vm-check-vars' is not valid
error: Cannot build '/nix/store/y99w5pf48bn9w60qdm736qlc0vccczvj-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/87nfmac8k26pz9jqharyzzklz5yy80vm-check-vars