# Pastebin XteJTwQv ~/projects/nixpkgs emacsHead 8s ❯ nix-env -f . -i emacsHead error: selector 'emacsHead' matches no derivations ~/projects/nixpkgs emacsHead 8s ❯ nix-env -f . -qaP 'emacs*' emacs25 emacs-25.3 emacs emacs-26.2 emacsHead emacs-27