these 2 derivations will be built:
  /nix/store/9n4mlmynnrj9v28k966hp0winsdkdchf-closure-info.drv
  /nix/store/98cvc2k1fri0rkicp3lhhrrcd9wc66dz-check-vars.drv
error: path '/nix/store/6kjpsq3fmw5qlfq5x7l54iqz8r9sdyfn-check-vars' is not valid
error: Cannot build '/nix/store/98cvc2k1fri0rkicp3lhhrrcd9wc66dz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/6kjpsq3fmw5qlfq5x7l54iqz8r9sdyfn-check-vars