these 2 derivations will be built:
  /nix/store/yi30ckmn2vf5w8g48v4qrcg1l1crjg1y-closure-info.drv
  /nix/store/qhsnba7aghf1zf8gplhm31m1w192qp9n-check-vars.drv
error: path '/nix/store/rqvra4ljpwv04x9cd5sn1hii8aglasvh-check-vars' is not valid
error: Cannot build '/nix/store/qhsnba7aghf1zf8gplhm31m1w192qp9n-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/rqvra4ljpwv04x9cd5sn1hii8aglasvh-check-vars