diff --git a/Dockerfile.cross b/Dockerfile.cross
index 7ce3cc9..6c53524 100644
--- a/Dockerfile.cross
+++ b/Dockerfile.cross
@@ -64,6 +64,13 @@ RUN ./prepare-cross-toolchain.sh $TOOLCHAIN_PREFIX $CROSS_TOOLCHAIN_PREFIX $CROS
 COPY build-make.sh .
 RUN ./build-make.sh $CROSS_TOOLCHAIN_PREFIX --host=$HOST
 
+ARG WITH_BUSYBOX
+
+COPY build-busybox.sh .
+RUN if [ -n "$WITH_BUSYBOX" ]; then \
+        ./build-busybox.sh $CROSS_TOOLCHAIN_PREFIX/busybox --host=$HOST; \
+    fi
+
 ARG TAG
 RUN ln -s $CROSS_TOOLCHAIN_PREFIX llvm-mingw-$TAG$CROSS_ARCH && \
     zip -9r /llvm-mingw-$TAG$CROSS_ARCH.zip llvm-mingw-$TAG$CROSS_ARCH && \