nixos/zerotierone: clean up local.conf symlinks unconditionally

        mkdir -p /var/lib/zerotier-one/networks.d

        chmod 700 /var/lib/zerotier-one

        chown -R root:root /var/lib/zerotier-one

        # cleans up old symlinks also if we unset localConf

        if [[ -L "${localConfFilePath}" && "$(readlink "${localConfFilePath}")" =~ ^${builtins.storeDir}.* ]]; then

          rm ${localConfFilePath}

        fi

      '' + (concatMapStrings (netId: ''

        touch "/var/lib/zerotier-one/networks.d/${netId}.conf"

      '') cfg.joinNetworks) + optionalString (cfg.localConf != {}) ''

        if [ -L "${localConfFilePath}" ]

        then

          rm ${localConfFilePath}

        elif [ -f "${localConfFilePath}" ]

        then

      '') cfg.joinNetworks) + lib.optionalString (cfg.localConf != {}) ''

        # in case the user has applied manual changes to the local.conf, we backup the file

        if [ -f "${localConfFilePath}" ]; then

          mv ${localConfFilePath} ${localConfFilePath}.bak

        fi

        ln -s ${localConfFile} ${localConfFilePath}