`-v` is not supported in zsh 5.1.1
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@ -22,7 +22,7 @@
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# Bail out if it's not the first time the file is being sourced.
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# Second sourcing will cause mayhem.
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[[ -v _P9K_SOURCED ]] && return
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[[ -n "${_P9K_SOURCED}" ]] && return
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readonly _P9K_SOURCED=1
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typeset -g _P9K_INSTALLATION_DIR
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