use_flake() { watch_file flake.nix watch_file flake.lock watch_file default.nix watch_file shell.nix profile="$(direnv_layout_dir)"/flake-profile mkdir -p "$(direnv_layout_dir)" eval "$(time nix print-dev-env --show-trace --profile "$profile" || echo false)" && nix-store --add-root "shell.root" --indirect --realise "$profile" && nix-env --delete-generations +1 --profile "$profile" } use flake