Hi Guix, please try to use packages in the documented way before engaging Guix® Support :-) yes, you are right, sorry for my too quick question. I acted according to my experience of trying yt-dlp earlier on, and it didn't work.(it was not in Guix SD, but in an other Distro) and also in using other Guix commands and I lost a lot of time. So I dicided to ask quickly. I beg your pardon. Kind regards Gottfried