try to debug the issue

build.sh

@@ -24,7 +24,7 @@ else
 fi
 
 echo "Building image"
-buildah bud --pull-always $cache_flag -f "./Dockerfile.el7" -t "${NAME}:${VERSION}" "${basedir}"
+buildah bud --log-level debug --pull-always $cache_flag -f "./Dockerfile.el7" -t "${NAME}:${VERSION}" "${basedir}"
 echo -e "Building image \033[0;32mdone\033[0m"
 
 echo "Exporting image"