these 4 derivations will be built:
  /nix/store/bg0b0sz2rbmi3ks4r3730sk461xc08i7-clan-cli-source.drv
  /nix/store/d4mz8p6jksp1v9i1wv6c9hk1fjddv2pr-clan-cli.drv
  /nix/store/gqnin4rbf3z8z9f1lhr9cmd3n6rf6xn9-closure-info.drv
  /nix/store/r5hh2b3q45jky5sgc6mfsrq3914wjcrm-check-vars.drv
error: path '/nix/store/adwakqgz9pgsqkf2ysw5846zc8ggx944-check-vars' is not valid
error: Cannot build '/nix/store/r5hh2b3q45jky5sgc6mfsrq3914wjcrm-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/adwakqgz9pgsqkf2ysw5846zc8ggx944-check-vars