these 2 derivations will be built:
  /nix/store/zifxswglmv38036kg2lbfi97cvkmmdj3-closure-info.drv
  /nix/store/8y8pdi3dnclzj2518y0szzf8qpzrgq41-check-vars.drv
error: path '/nix/store/6vrar7wvrbcmdzcv08f4906dss8rnc1b-check-vars' is not valid
error: Cannot build '/nix/store/8y8pdi3dnclzj2518y0szzf8qpzrgq41-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6vrar7wvrbcmdzcv08f4906dss8rnc1b-check-vars