Fix incorrect make statement
Fix incorrect make statement

fixes #1486

MichaelMaar/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,TimDix/concrete5,avdevs/concrete5,avdevs/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,TimDix/concrete5,TimDix/concrete5,avdevs/concrete5