these 5 derivations will be built:
  /nix/store/5yhprbndx1fddi8xa6nbxiza4b82kh4g-closure-info.drv
  /nix/store/r48gnk83gckil4jin7fzzz9bqxq6zm2b-clan-runtime.drv
  /nix/store/ajk9i6a2m7qgwbfbx75g7f73cgw5gzll-clan-cli-source.drv
  /nix/store/f8rcn273x3gfpp6d3rvdylbz5ngmwxw4-clan-cli.drv
  /nix/store/1vf229jqhm3yisqgpj773la5rqdal35h-check-vars.drv
error: path '/nix/store/rkjlhp87dydcsbhrml41z3cnsi5r1bg4-check-vars' is not valid
error: Cannot build '/nix/store/1vf229jqhm3yisqgpj773la5rqdal35h-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/rkjlhp87dydcsbhrml41z3cnsi5r1bg4-check-vars