these 2 derivations will be built:
  /nix/store/irw4g7lph58cglkdiv1hw2rzwj8k70nn-closure-info.drv
  /nix/store/3942av8zghmrc12azxl21rg50ddrcv4k-check-vars.drv
error: path '/nix/store/czsa0p3z5wlbcd8nqr5l3naqmc4rf5n9-check-vars' is not valid
error: Cannot build '/nix/store/3942av8zghmrc12azxl21rg50ddrcv4k-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/czsa0p3z5wlbcd8nqr5l3naqmc4rf5n9-check-vars