# Name-based Tcl package directories
The structure of this directory is identical to the one described in
[/pkgs/by-name/README.md](../../../by-name/README.md).
The only difference is the scope:
```nix
{
lib,
# You can get tclPackages attributes directly
mkTclDerivation,
tcllib,
}:
mkTclDerivation {
# ...
}
```