diff --git a/Dockerfile b/Dockerfile
index b10cec761..019383a1f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -44,7 +44,7 @@ ARG TOOLS="                           \
         unzip                         \
         wget"
 
-RUN --mount=type=cache,target=/var/cache/apt \
+RUN --mount=type=cache,target=/var/cache/apt,sharing=private \
     sed -i 's@http://.*.debian.org@http://mirrors.ustc.edu.cn@g' /etc/apt/sources.list \
     && rm -f /etc/apt/apt.conf.d/docker-clean \
     && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
diff --git a/Dockerfile.loong64 b/Dockerfile.loong64
index e8f64bc95..308b6b658 100644
--- a/Dockerfile.loong64
+++ b/Dockerfile.loong64
@@ -44,7 +44,7 @@ ARG TOOLS="                           \
         unzip                         \
         wget"
 
-RUN --mount=type=cache,target=/var/cache/apt \
+RUN --mount=type=cache,target=/var/cache/apt,sharing=private \
     set -ex \
     && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
     && apt-get update \