these 3 derivations will be built:
  /nix/store/2k0xgr62fbmq8l72g92z7n2dlnafmcy7-closure-info.drv
  /nix/store/bcjxl0brrbm0p2yln8spsrwbgdw7q64v-clan-cli.drv
  /nix/store/gsc8mfn68gdc9y0gsypcd4whckdn372l-check-vars.drv
error: path '/nix/store/a7rsygbhyypnlyb67yamvcfsfkifqphp-check-vars' is not valid
error: Cannot build '/nix/store/gsc8mfn68gdc9y0gsypcd4whckdn372l-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/a7rsygbhyypnlyb67yamvcfsfkifqphp-check-vars