Properly interpolate variable.
Properly interpolate variable.

CenturyLinkLabs/golang-builder,ethernetdan/golang-builder,patocox/golang-builder,alpe/golang-builder,matt-deboer/golang-builder,argvader/golang-builder,rupakg/golang-builder,safenetlabs/golang-builder,tryggth/golang-builder,GoogleCloudPlatform/golang-builder,safenetlabs/golang-builder