diff --git a/ubt-core/src/gcc/static/alpine-build.sh b/ubt-core/src/gcc/static/alpine-build.sh
index f557611..815f709 100644
--- a/ubt-core/src/gcc/static/alpine-build.sh
+++ b/ubt-core/src/gcc/static/alpine-build.sh
@@ -61,6 +61,9 @@ ls -lhaS
 dockerfile=Dockerfile.out
 cat > $dockerfile <<EOF
 FROM alpine:3.15
+RUN export domain="mirrors.ustc.edu.cn"; \
+  echo "http://\$domain/alpine/v3.15/main" > /etc/apk/repositories; \
+  echo "http://\$domain/alpine/v3.15/community" >> /etc/apk/repositories
 ADD ./rootfs /rootfs
 EOF