command not found: xsel -ob

I'm using Manjaro Linux. I've changed my yt-dlp's zsh configuration and now I get ❯ ytvp deal_with_long_filename:1: command not found: xsel -ob deal_with_long_filename:2: command not found: xsel -ob The log shows Usage: yt-dlp [OPTIONS] URL [URL...] yt-dlp: error: no such option: --continue --no-overwrites --no-post-overwrites --verbose --restrict-filenames --retry-sleep fragment:exp Usage: yt-dlp [OPTIONS] URL [URL...] yt-dlp: error: no such option: --continue --no-overwrites --no-post-overwrites --verbose --restrict-filenames --retry-sleep fragment:exp Why is it treating all options as a single one? I've tried running the xsel -ob command on its own and it works fine. How do I fix this? I would like to keep the send to background & option that I was using. Would it give problems with the definition of the function deal_with_long_filename? This is my configuration now opts="--continue --no-overwrites --no-post-overwrites --verbose --restrict-filenames --retry-sleep fragment:exp=2:64 --print-to-file" if [ -f /usr/local/bin/youtube-dl ]; then yt_dlp="/usr/local/bin/yt-dlp" else yt_dlp="$(which yt-dlp)" fi # If using Mac if [[ "$(uname -a | awk '{print $1}')" == "Darwin" ]]; then paste="pbpaste" opts="${opts} --ffmpeg-location /usr/local/bin/ffmpeg" else # If using Linux paste="xsel -ob" fi sanitize_linux_filename() { echo "$1" | sed -e 's/[^a-zA-Z0-9._-]/_/g' } get_log_name() { TIMESTAMP=$( date +%y%m%d%H%M%S ) NAME=$( sanitize_linux_filename "$1" ) echo "yt-dlp_${TIMESTAMP}_${NAME}.log" } deal_with_long_filename() { if ! $yt_dlp $opts --output "%(upload_date>%Y-%m-%d|)s%(upload_date& |)s%(title)s-%(id)s.%(ext)s" "$($paste)" >> "/tmp/$LOG_NAME" 2>&1; then $yt_dlp $opts --output "%(upload_date>%Y-%m-%d|)s%(upload_date& |)%(webpage_url_domain)s-%(id)s.%(ext)s" "$($paste)" >> "/tmp/$LOG_NAME" 2>&1 fi } # Video Playlist ytvp() { LOG_NAME=$( get_log_name "$1" ) opts="${opts} --format '(bv+(wa[abr>=64]/ba))/b' --format-sort res:720,tbr~2000 --no-playlist --download-archive 'downloaded.txt'" deal_with_long_filename "$1" "$LOG_NAME" }