fix build error

rubygem-unf_ext.spec

@@ -2,7 +2,7 @@
 Summary:                Unicode Normalization Form support library for CRuby
 Name:                   rubygem-%{gem_name}
 Version:                0.0.8.2
-Release:                1
+Release:                2
 License:                MIT
 URL:                    https://github.com/knu/ruby-unf_ext
 Source0:                http://rubygems.org/gems/%{gem_name}-%{version}.gem
@@ -59,7 +59,7 @@ sed -i.orig \
     test/helper.rb
 sed -i -e '2i gem "test-unit"' test/helper.rb
 ruby \
-    -Ilib:test:.:ext/%{gem_name} \
+    -Ilib:test:.:%{buildroot}%{gem_extdir_mri} \
     test/test_unf_ext.rb
 
 %files
@@ -81,6 +81,9 @@ ruby \
 %exclude %{gem_instdir}/test/
 
 %changelog
+* Tue Aug 01 2023 wulei <wu_lei@hoperun.com> - 0.0.8.2-2
+- Use %%gem_extdir_mri instead of ext for %%check due to ruby3.2 change for ext cleanup during build
+
 * Thu Jun 30 2022 houyingchao <houyingchao@partners.com> - 0.0.8.2-1
 - Upgrade to 0.0.8.2