diff --git a/docker/Dockerfile.go_build b/docker/Dockerfile.go_build
index 3628d0c0d..213ed2dee 100644
--- a/docker/Dockerfile.go_build
+++ b/docker/Dockerfile.go_build
@@ -3,7 +3,7 @@ RUN apk add git go g++
 RUN mkdir -p /go/src/github.com/chrislusf/
 RUN git clone https://github.com/chrislusf/seaweedfs /go/src/github.com/chrislusf/seaweedfs
 RUN cd /go/src/github.com/chrislusf/seaweedfs/weed \
-  && LDFLAGS="-X github.com/chrislusf/seaweedfs/weed/util.COMMIT=$(git rev-parse --short HEAD)" \
+  && export LDFLAGS="-X github.com/chrislusf/seaweedfs/weed/util.COMMIT=$(git rev-parse --short HEAD)" \
   && go install -ldflags ${LDFLAGS}
 
 FROM alpine AS final