these 2 derivations will be built:
  /nix/store/wxka7brmvh7wzd4m3vzm78s0s1qprsy3-closure-info.drv
  /nix/store/9gxr8fdr4w1ca609zjlvp77ddhx6mc03-check-vars.drv
error: path '/nix/store/cmy2f6i7hawj0xrik1p06yh31m0w5jp2-check-vars' is not valid
error: Cannot build '/nix/store/9gxr8fdr4w1ca609zjlvp77ddhx6mc03-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/cmy2f6i7hawj0xrik1p06yh31m0w5jp2-check-vars