diff --git a/Dockerfile b/Dockerfile
index 2fba817..a31fd61 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,6 +20,10 @@ RUN sed -i 's/^CXX=clang++$/&-18/' Makefile
 
 RUN make nosandbox -j$(nproc)
 
+# export-only stage: `docker build --target=export --output=./bin .`
+FROM scratch AS export
+COPY --from=build /usr/src/app/bin/fusion /fusion
+
 # prod
 FROM alpine:3
 
diff --git a/build_docker.sh b/build_docker.sh
new file mode 100755
index 0000000..772f75f
--- /dev/null
+++ b/build_docker.sh
@@ -0,0 +1 @@
+docker build --target=export --output=./bin .