these 3 derivations will be built:
  /nix/store/697f3q2zkgslzxgv2z2gjrmqy5pwhdqg-closure-info.drv
  /nix/store/a5g6qljknb8imnp5l68p1al8yvlw7snb-clan-cli.drv
  /nix/store/xjpn3k8kw9qq2gzw8mbcg63s4gc4hvaa-check-vars.drv
error: path '/nix/store/1gn70gy1rdmib4ijknh524982gvqi20a-check-vars' is not valid
error: Cannot build '/nix/store/xjpn3k8kw9qq2gzw8mbcg63s4gc4hvaa-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/1gn70gy1rdmib4ijknh524982gvqi20a-check-vars