these 4 derivations will be built:
  /nix/store/61dh1j21pbf34jdaxcqm97a995wya0sx-clan-cli-source.drv
  /nix/store/nmjbydiqn20qz7ln4y3agkp76qd76gmd-clan-cli.drv
  /nix/store/vmyj25larg94zn0qyfn4qdi6l25918v6-closure-info.drv
  /nix/store/w64lxn3wizbp7w0ksgabldlgb0a2w5yz-check-vars.drv
error: path '/nix/store/pvvm4srbz96sf2cb6jpj1kjfbpyhk9al-check-vars' is not valid
error: Cannot build '/nix/store/w64lxn3wizbp7w0ksgabldlgb0a2w5yz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/pvvm4srbz96sf2cb6jpj1kjfbpyhk9al-check-vars