Do not do desktop-file-validate on RHEL

khelpcenter.spec

@@ -70,7 +70,12 @@ cp -alf \
 
 %check
 appstream-util validate-relax --nonet %{buildroot}%{_kf5_metainfodir}/org.kde.%{name}.metainfo.xml
+## currently fails on all RHEL releases
+# RHEL8: https://bugzilla.redhat.com/show_bug.cgi?id=2107277
+# RHEL9: https://bugzilla.redhat.com/show_bug.cgi?id=2107278
+%if !0%{?rhel}
 desktop-file-validate %{buildroot}%{_datadir}/applications/org.kde.%{name}.desktop
+%endif
 
 %files -f %{name}.lang
 %doc README.metadata