these 5 derivations will be built:
  /nix/store/2yyndw6b35fr5p8lzpv76qbgab7x19jv-clan-runtime.drv
  /nix/store/5hmsnwzw0cvibhml340mv9h3dn2ix79k-closure-info.drv
  /nix/store/5n2h7rkgfbyby27lksxj4baz5g9qpcsd-clan-cli-source.drv
  /nix/store/x2609sv05f54m3sds28xq9ja92vc06zm-clan-cli.drv
  /nix/store/nnwby4jmgzxqxakgxn2armvwbamph76c-check-vars.drv
error: path '/nix/store/3mkhn8fa6whfch0dbs26gjqa8nif4sal-check-vars' is not valid
error: Cannot build '/nix/store/nnwby4jmgzxqxakgxn2armvwbamph76c-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/3mkhn8fa6whfch0dbs26gjqa8nif4sal-check-vars