these 4 derivations will be built:
  /nix/store/vzp44ln8s6bypjbfavaacc73craikcnj-clan-cli-source.drv
  /nix/store/fvmgj8v2i6mhdp3jdblq4npsyjvlkk24-clan-cli.drv
  /nix/store/lxsypngbn47df4p4984cwssqs04zs2mm-closure-info.drv
  /nix/store/l8pn1x1iifyssjk028hxfwbs64dcvi51-check-vars.drv
error: path '/nix/store/8cywgmq7nnlcl5khvz0j83c9x66161lr-check-vars' is not valid
error: Cannot build '/nix/store/l8pn1x1iifyssjk028hxfwbs64dcvi51-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/8cywgmq7nnlcl5khvz0j83c9x66161lr-check-vars