these 2 derivations will be built:
  /nix/store/r6m6fq9vbl22wa465gwl6fa6jdj5bxz0-closure-info.drv
  /nix/store/bxi55ch2xy37x8c2n14cp5z54rcf3534-check-vars.drv
error: path '/nix/store/zrkjrym3z3lm04g5dv47dg7f6qn872qj-check-vars' is not valid
error: Cannot build '/nix/store/bxi55ch2xy37x8c2n14cp5z54rcf3534-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/zrkjrym3z3lm04g5dv47dg7f6qn872qj-check-vars