diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2f1341b..1f302a9 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -93,7 +93,10 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # 阶段 4：CMake 4.0（vllm 要求 ≥ 4.0，Ubuntu 24.04 自带 3.28 不够）
 # ===========================================================================
 RUN cd /tmp && \
-    wget -q ${GH_PROXY}https://github.com/Kitware/CMake/releases/download/v4.0.0/cmake-4.0.0-linux-x86_64.tar.gz && \
+    # 优先直连 GitHub（network: host 可用），失败则尝试 ghproxy 备用
+    (wget -q https://github.com/Kitware/CMake/releases/download/v4.0.0/cmake-4.0.0-linux-x86_64.tar.gz || \
+     wget -q ${GH_PROXY}https://github.com/Kitware/CMake/releases/download/v4.0.0/cmake-4.0.0-linux-x86_64.tar.gz || \
+     wget -q https://gh-proxy.com/https://github.com/Kitware/CMake/releases/download/v4.0.0/cmake-4.0.0-linux-x86_64.tar.gz) && \
     tar -xzf cmake-4.0.0-linux-x86_64.tar.gz && \
     cp -r cmake-4.0.0-linux-x86_64/bin/* /usr/local/bin/ && \
     cp -r cmake-4.0.0-linux-x86_64/share/* /usr/local/share/ && \
@@ -128,11 +131,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # ===========================================================================
-# 阶段 7：amd-aiter + flash_attn（GitHub 通过 ghproxy 加速）
+# 阶段 7：amd-aiter + flash_attn
 # ===========================================================================
 RUN set -ex && \
-    # 配置 git 走 ghproxy
-    git config --global url."${GH_PROXY}https://github.com/".insteadOf "https://github.com/" && \
     # aiter（AMD 优化的 attention 算子）
     cd /opt && git clone --recursive --depth 1 https://github.com/ROCm/aiter.git && \
     ${VENV}/bin/pip install --no-cache-dir -e /opt/aiter && \
@@ -147,8 +148,6 @@ RUN set -ex && \
 # 阶段 8：编译 vllm
 # ===========================================================================
 RUN set -ex && \
-    # 配置 git 走 ghproxy（新 RUN 层需重新配置）
-    git config --global url."${GH_PROXY}https://github.com/".insteadOf "https://github.com/" && \
     # setuptools 升级（PEP 639 兼容）
     ${VENV}/bin/pip install --no-cache-dir -U \
         "setuptools>=77.0.3" setuptools_scm setuptools_rust wheel && \