these 2 derivations will be built:
  /nix/store/4kh797s4jxav8wxjrrl7b36b9kz6k1rm-closure-info.drv
  /nix/store/8xlmwy2abg72imil3yr04fya2w2kmkv9-check-vars.drv
error: path '/nix/store/q8h6q45qqqd70jajsm018sp6cq7qm7yg-check-vars' is not valid
error: Cannot build '/nix/store/8xlmwy2abg72imil3yr04fya2w2kmkv9-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/q8h6q45qqqd70jajsm018sp6cq7qm7yg-check-vars