diff --git a/release-centos7/build/build-tiflash-ci.sh b/release-centos7/build/build-tiflash-ci.sh
index 9458c50d5e6..b6c13241ef2 100755
--- a/release-centos7/build/build-tiflash-ci.sh
+++ b/release-centos7/build/build-tiflash-ci.sh
@@ -147,6 +147,9 @@ cp -r "${SRCPATH}/cluster_manage/dist/flash_cluster_manager" "${INSTALL_DIR}"/fl
 cp -f "$build_dir/dbms/src/Server/tiflash" "${INSTALL_DIR}/tiflash"
 cp -f "${SRCPATH}/libs/libtiflash-proxy/libtiflash_proxy.so" "${INSTALL_DIR}/libtiflash_proxy.so"
 ldd "${INSTALL_DIR}/tiflash"
+
+ldd "${INSTALL_DIR}/tiflash" | grep 'libnsl.so' | grep '=>' | awk '{print $3}' | xargs -I {} cp {} "${INSTALL_DIR}"
+
 cd "${INSTALL_DIR}"
 chrpath -d libtiflash_proxy.so "${INSTALL_DIR}/tiflash"
 ldd "${INSTALL_DIR}/tiflash"
diff --git a/release-centos7/build/build-tiflash-release.sh b/release-centos7/build/build-tiflash-release.sh
index 7a6a5e9db8f..e1ada2afea3 100755
--- a/release-centos7/build/build-tiflash-release.sh
+++ b/release-centos7/build/build-tiflash-release.sh
@@ -20,7 +20,7 @@ SRCPATH=$(cd ${SCRIPTPATH}/../..; pwd -P)
 NPROC=${NPROC:-$(nproc || grep -c ^processor /proc/cpuinfo)}
 ENABLE_EMBEDDED_COMPILER="FALSE"
 
-install_dir="$SRCPATH/release-centos7/tiflash"
+INSTALL_DIR="${SRCPATH}/release-centos7/tiflash"
 
 if [ -d "$SRCPATH/contrib/kvproto" ]; then
   cd "$SRCPATH/contrib/kvproto"
@@ -40,10 +40,10 @@ rm -rf ${SRCPATH}/libs/libtiflash-proxy
 mkdir -p ${SRCPATH}/libs/libtiflash-proxy
 ln -s ${SRCPATH}/contrib/tiflash-proxy/target/release/libtiflash_proxy.so ${SRCPATH}/libs/libtiflash-proxy/libtiflash_proxy.so
 
-build_dir="$SRCPATH/release-centos7/build-release"
-rm -rf $build_dir && mkdir -p $build_dir && cd $build_dir
+BUILD_DIR="${SRCPATH}/release-centos7/build-release"
+rm -rf ${BUILD_DIR} && mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
 
-cmake "$SRCPATH" ${DEFINE_CMAKE_PREFIX_PATH} \
+cmake "${SRCPATH}" ${DEFINE_CMAKE_PREFIX_PATH} \
       -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} \
       -DENABLE_EMBEDDED_COMPILER=${ENABLE_EMBEDDED_COMPILER} \
       -DENABLE_ICU=OFF \
@@ -53,15 +53,19 @@ cmake "$SRCPATH" ${DEFINE_CMAKE_PREFIX_PATH} \
       -Wno-dev \
       -DUSE_CCACHE=OFF
 
-make -j $NPROC tiflash
+make -j ${NPROC} tiflash
 
 # Reduce binary size by compressing.
-objcopy --compress-debug-sections=zlib-gnu "$build_dir/dbms/src/Server/tiflash"
+objcopy --compress-debug-sections=zlib-gnu "${BUILD_DIR}/dbms/src/Server/tiflash"
 
-cp -f "$build_dir/dbms/src/Server/tiflash" "$install_dir/tiflash"
-cp -f "${SRCPATH}/libs/libtiflash-proxy/libtiflash_proxy.so" "$install_dir/libtiflash_proxy.so"
+cp -f "${BUILD_DIR}/dbms/src/Server/tiflash" "${INSTALL_DIR}/tiflash"
+cp -f "${SRCPATH}/libs/libtiflash-proxy/libtiflash_proxy.so" "${INSTALL_DIR}/libtiflash_proxy.so"
 
-ldd "$install_dir/tiflash"
-cd "$install_dir"
-chrpath -d libtiflash_proxy.so "$install_dir/tiflash"
-ldd "$install_dir/tiflash"
+ldd "${INSTALL_DIR}/tiflash"
+
+ldd "${INSTALL_DIR}/tiflash" | grep 'libnsl.so' | grep '=>' | awk '{print $3}' | xargs -I {} cp {} "${INSTALL_DIR}"
+
+cd "${INSTALL_DIR}"
+chrpath -d libtiflash_proxy.so "${INSTALL_DIR}/tiflash"
+ldd "${INSTALL_DIR}/tiflash"
+ls -lh "${INSTALL_DIR}"