these 4 derivations will be built:
  /nix/store/izapqk8q8gk1x8c1nmxv8793yqqxvhb0-closure-info.drv
  /nix/store/wnczg4df76sq64indmanam8kkxv0xd21-clan-cli-source.drv
  /nix/store/k745wbi8cpmq0s305rghbccjn9dp0sp1-clan-cli.drv
  /nix/store/dwdcck4im87wgip6in90inx8jcfwqy0q-check-vars.drv
error: path '/nix/store/18b0ax3y2fh3nbj3w44d7mi9fql7nb02-check-vars' is not valid
error: Cannot build '/nix/store/dwdcck4im87wgip6in90inx8jcfwqy0q-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/18b0ax3y2fh3nbj3w44d7mi9fql7nb02-check-vars