diff --git a/podman-seafile/ci_build-images.sh b/podman-seafile/ci_build-images.sh
index 8e8df05..7aa53f8 100755
--- a/podman-seafile/ci_build-images.sh
+++ b/podman-seafile/ci_build-images.sh
@@ -1,31 +1,32 @@
 #!/usr/bin/env bash
 
 ABSDIR="$( dirname "$(readlink -f -- "$0")" )"
-source ${ABSDIR}/../functions.sh
-source ${ABSDIR}/vars.sh
+source "${ABSDIR}"/../functions.sh
+source "${ABSDIR}"/vars.sh
 
 ensure_pwd_is_scriptdir
 ensure_not_root
 
 buildfolder=/tmp/seafile-$$
 
-if ! podman image exists ${seafile_image}:${seafile_release}; then
+if ! podman image exists "${seafile_image}":"${seafile_release}"; then
     mkdir ${buildfolder} &&
-    git clone --depth=1 https://github.com/haiwen/seafile-docker.git ${buildfolder}/ && {
-	sed_in_place "^FROM phusion" "FROM docker.io/phusion" ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile &&
-	sed_in_place "SEAFILE_VERSION=" "SEAFILE_VERSION=${seafile_release}" ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile &&
-	sed_in_place "pip -i https://pypi.tuna.tsinghua.edu.cn/simple/" "pip" ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile &&
-        sed_in_place "    -i https://pypi.tuna.tsinghua.edu.cn/simple/" "    " ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile &&
-        sed_in_place 'wget https://seafile-downloads.oss-cn-shanghai.aliyuncs.com' 'wget -q https://download.seadrive.org' ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile &&
-        sed_in_place 'tar -zxvf' 'tar -zxf' ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile &&
-        podman image build -t ${seafile_image}:${seafile_release} \
-	   -f ${buildfolder}/image/seafile_${seafile_release%.*}/Dockerfile \
+    if git clone --depth=1 https://github.com/haiwen/seafile-docker.git ${buildfolder}/ ; then
+	sed_in_place "^FROM phusion" "FROM docker.io/phusion" ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile &&
+	sed_in_place "SEAFILE_VERSION=" "SEAFILE_VERSION=${seafile_release}" ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile &&
+	sed_in_place "pip -i https://pypi.tuna.tsinghua.edu.cn/simple/" "pip" ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile &&
+        sed_in_place "    -i https://pypi.tuna.tsinghua.edu.cn/simple/" "    " ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile &&
+        sed_in_place 'wget https://seafile-downloads.oss-cn-shanghai.aliyuncs.com' 'wget -q https://download.seadrive.org' ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile &&
+        sed_in_place 'tar -zxvf' 'tar -zxf' ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile &&
+        podman image build -t "${seafile_image}":"${seafile_release}" \
+	   -f ${buildfolder}/image/seafile_"${seafile_release%.*}"/Dockerfile \
 	   ${buildfolder} || retval=false
-	podman image rm -f $(podman image list -a -q -- phusion/baseimage) }
+	podman image rm -f "$(podman image list -a -q -- phusion/baseimage)"
+    fi
     rm -rf ${buildfolder}
-    eval $retval
+    eval "$retval"
 else
     echo "Image ${seafile_image}:${seafile_release} already built"
 fi &&
 
-oci_push_to_registry ${seafile_image}:${seafile_release}
+oci_push_to_registry "${seafile_image}":"${seafile_release}"