these 5 derivations will be built:
  /nix/store/sfg30ah5s92iwy4n0srhn8faczpdsh1z-clan-runtime.drv
  /nix/store/8j5bz5hyh09sjl7kzszr18fqf1lww06q-clan-cli-source.drv
  /nix/store/bk1jl1pabwpcji9z9mhlf6qnc7p3cr57-closure-info.drv
  /nix/store/xzqm6p56anwh2yrxycglbwm6jbiavxdm-clan-cli.drv
  /nix/store/ksdhv60a5c64ac4xgqkwimwr63aj3k9b-check-vars.drv
error: path '/nix/store/q1plnw5rzhy66483wff8k7bbch8vvk4p-check-vars' is not valid
error: Cannot build '/nix/store/ksdhv60a5c64ac4xgqkwimwr63aj3k9b-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/q1plnw5rzhy66483wff8k7bbch8vvk4p-check-vars