Nix-shell -p, but without opening new shell?

3

I have this in my shell config:

nix-load() {
        local s=""
        for attr in "$@"; do
                s="$s nixpkgs#$attr"
        done
        paths="$(nix build --no-link --print-out-paths $s)"
        for p in $paths; do
                export PATH="$p/bin:$PATH"
        done
}

Example: nix-load ffmpeg adds ffmpeg to the current shell’s PATH.

Note that this is equivalent to nix shell, not nix-shell. This means it only adds things to PATH. It doesn’t run stdenv setup hooks like nix-shell -p does.

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