these 2 derivations will be built:
  /nix/store/ryhax7vgq4l938hcvzip3klwhidabyq8-closure-info.drv
  /nix/store/yy8pqxk01snrrlj7l16glcn60mk8mgmw-check-vars.drv
error: path '/nix/store/1xgapv1c8fqi3hpmfi2fprm8781yvdiw-check-vars' is not valid
error: Cannot build '/nix/store/yy8pqxk01snrrlj7l16glcn60mk8mgmw-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/1xgapv1c8fqi3hpmfi2fprm8781yvdiw-check-vars