CBQE-2358 fix failed in windows installation

Change-Id: I2c2eeadeb1adc6c8e8fe8ce6c56834bf94600e19
Reviewed-on: http://review.couchbase.org/40127
Reviewed-by: Thuan Nguyen <soccon@gmail.com>
Tested-by: Thuan Nguyen <soccon@gmail.com>