Error while loading shared libraries: libboost_context.so.1.69.0: cannot open shared object file: No such file or directory

I tried these from Nix - ArchWiki

 06:52:32  jr@fm  ~  ⬡ v8.16.0 
$ sudo chown -R $USER. /nix/var/nix/{gcroots,profiles}
[sudo] password for jr: 

 06:52:40  jr@fm  ~  ⬡ v8.16.0 
$ nix-channel --add https://nixos.org/channels/nixpkgs-unstable

 06:52:48  jr@fm  ~  ⬡ v8.16.0 
$ nix-channel --update
unpacking channels...
warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring

 06:52:55  jr@fm  ~  ⬡ v8.16.0 
$ nix-env -u
warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring

 06:53:05  jr@fm  ~  ⬡ v8.16.0  6s 
$ sudo nix-channel --update
warning: the group 'nixbld' specified in 'build-users-group' does not exist
unpacking channels...
warning: the group 'nixbld' specified in 'build-users-group' does not exist
error: the group 'nixbld' specified in 'build-users-group' does not exist
error: program '/nix/store/6chjfy4j6hjwj5f8zcbbdg02i21x1qsi-nix-2.3.1/bin/nix-env' failed with exit code 1

 06:53:06  ✘  jr@fm  ~  ⬡ v8.16.0 
$ 

I’ll revisit warning: the group 'nixbld' specified in 'build-users-group' does not exist later.