these 2 derivations will be built:
  /nix/store/x537ray99q9b7kjr7jf5hgcf9199l4hg-closure-info.drv
  /nix/store/rfqyz7rsylglwnfh6x4wgznpqnyha297-check-vars.drv
error: path '/nix/store/4lxqz9k47w5kn9578lsmfnj8hqpdxcsl-check-vars' is not valid
error: Cannot build '/nix/store/rfqyz7rsylglwnfh6x4wgznpqnyha297-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/4lxqz9k47w5kn9578lsmfnj8hqpdxcsl-check-vars