self: super: { youtube-dl = super.youtube-dl.overrideAttrs (oldAttrs: rec { version = "2021.04.07"; src = super.fetchurl { url = "https://yt-dl.org/downloads/${version}/${oldAttrs.pname}-${version}.tar.gz"; sha256 = "02d51l6gdjr3zhhi7ydf5kzv8dv4jzq0ygja7zb2h9k7hnl0l27m"; }; }); }