diff --git a/lib/ocran/host_config_helper.rb b/lib/ocran/host_config_helper.rb
index 641fe8c..1e3ef90 100644
--- a/lib/ocran/host_config_helper.rb
+++ b/lib/ocran/host_config_helper.rb
@@ -1,8 +1,10 @@
 require "rbconfig"
+require_relative "refine_pathname"
 
 module Ocran
   # Variables describing the host's build environment.
   module HostConfigHelper
+    using RefinePathname
     module_function
 
     def exec_prefix