diff --git a/lib.sh b/lib.sh
index a8011a2..975fc3f 100755
--- a/lib.sh
+++ b/lib.sh
@@ -15,5 +15,5 @@ function get_package_name_ver {
   if test -z "${ver}"; then
     ver="$(grep "Version:" <<< "$(apt show ${name})" | awk '{print $2}')"
   fi
-  echo 'package_name="${name}"; package_ver="${ver}"'
+  echo ""${name}"="${ver}""
 }
diff --git a/pre_cache_action.sh b/pre_cache_action.sh
index 1b0c70c..84d9868 100755
--- a/pre_cache_action.sh
+++ b/pre_cache_action.sh
@@ -41,9 +41,8 @@ for package in ${packages}; do
     echo "aborted."
     echo "Package '${package}' not found." >&2
     exit 3
-  fi
-  get_package_name_ver "${package}" # -> package_name, package_ver  
-  versioned_packages="${versioned_packages} ${package_name}=${package_ver}"
+  fi  
+  versioned_packages=""${versioned_packages}" "$(get_package_name_ver "${package}")""
 done
 echo "done."