Debugging weird DNS resolutions inside sandbox

Run this with pasta: 
 $ nix-build -E 'let pkgs = (import <nixpkgs> {}); in pkgs.runCommand "resolvconf" { outputHashAlgo = "sha256"; outputHashMode = "flat"; outputHash = pkgs.lib.fakeHash; } "cat /etc/resolv.conf"'
 
 Report the result to a Lix developer.