zshrcがエラーを出す

~
❯ source ~/.zshrc
(eval):5: parse error near `>'
(eval):5: parse error in command substitution

function peco-select-history() {
	local tac
	if command -v tac > /dev/null; then
		tac="tac"
	else
		tac="tail -r"
	fi
	local hist_command="history -n 1"
	BUFFER=$(eval $hist_command | $tac | peco --query "$LBUFFER")
	CURSOR=$#BUFFER
	zle clear-screen
}
zle -N peco-select-history
bindkey '^r' peco-select-history

eval "$(/opt/homebrew/bin/brew shellenv)"

~
❯ source ~/.zshrc

function peco-select-history() {
	local tac
	if which tac > /dev/null; then
		tac="tac"
	else
		tac="tail -r"
	fi
	BUFFER=$(\history -n 1 | \
	eval $tac | \
		peco --query "$LBUFFER")
	CURSOR=$#BUFFER
	zle clear-screen
}
zle -N peco-select-history
bindkey '^r' peco-select-history