these 2 derivations will be built:
  /nix/store/7xyc6zbqbj6br9cx85yiklrvl79yjdsb-closure-info.drv
  /nix/store/j9yykkm4y3yd7q3fraga8czpxfzl8k1h-check-vars.drv
error: path '/nix/store/p9lzgwcwb16pxlmfjgifcq0jzscy9n9f-check-vars' is not valid
error: Cannot build '/nix/store/j9yykkm4y3yd7q3fraga8czpxfzl8k1h-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/p9lzgwcwb16pxlmfjgifcq0jzscy9n9f-check-vars