diff --git a/build.sh b/build.sh
index 326a621..09ed5fc 100755
--- a/build.sh
+++ b/build.sh
@@ -143,7 +143,7 @@ for GOOS in "${GOOSES[@]}"; do
 		fi
 		FILENAME="${NAME}_${RELEASE}_${GOOS}_${GOARCH}${SUFFIX}"
 		echo building "${FILENAME}"
-		GOOS=${GOOS} GOARCH=${GOARCH} CGO_ENABLED=0 go build -o "${FILENAME}"
+		GOOS=${GOOS} GOARCH=${GOARCH} CGO_ENABLED=0 go build -o "${FILENAME}" -ldflags "-X main.version=${RELEASE}"
 	done
 done
 
diff --git a/main.go b/main.go
index eb4f9dc..176fb55 100644
--- a/main.go
+++ b/main.go
@@ -10,9 +10,10 @@ import (
 	"github.com/nathanejohnson/whichca/cmd"
 )
 
+var version = ""
+
 func main() {
 	log := logpkg.New(os.Stdout, "", 0)
-	version := ""
 	bi, ok := debug.ReadBuildInfo()
 	if ok {
 		version = bi.Main.Version