Isso funciona para mim:
copy-to-xclip() {
zle kill-buffer
print -rn -- $CUTBUFFER | cb
}; zle -N copy-to-xclip
bindkey -M viins "^]" copy-to-xclip
paste-xclip() {
killring=("$CUTBUFFER" "${(@)killring[1,-2]}")
CUTBUFFER=$(xclip -selection clipboard -o)
zle yank
}; zle -N paste-xclip
bindkey -M vicmd "p" paste-xclip