Lookup path
Syntax
lookup-path =
<identifier [/identifier ]...>
A lookup path is an identifier with an optional path suffix that resolves to a path value if the identifier matches a search path entry in builtins.nixPath.
The algorithm for lookup path resolution is described in the documentation on builtins.findFile.
Example
<nixpkgs>/nix/var/nix/profiles/per-user/root/channels/nixpkgs
Example
<nixpkgs/nixos>/nix/var/nix/profiles/per-user/root/channels/nixpkgs/nixos