OpenSSL 4.0 is in experimental. This package fails to build against it:

| 1011: ovn-controller - ssl/tls files change when using command line options FAILED (ovs-macros.at:258)
…
| ERROR: 1135 tests were run,
| 1 failed unexpectedly.
| 33 tests were skipped.
| ## -------------------------- ##
| ## testsuite.log was created. ##
| ## -------------------------- ##
|
| Please send 'tests/testsuite.log' and all information you think might help:
|
|    To: <bugs@openvswitch.org>
|    Subject: [ovn 26.03.0] testsuite: 1011 failed
|
| You may investigate any problem if you feel able to do so, in which
| case the test suite provides a good starting point.  Its output may
| be found below 'tests/testsuite.dir'.
|
| ## ----------------------- ##
| ## ovn 26.03.0 test suite. ##
| ## ----------------------- ##
| 1011: ovn-controller - ssl/tls files change when using command line options FAILED (ovs-macros.at:258)
|
| ## ------------- ##
| ## Test results. ##
| ## ------------- ##
|
| ERROR: 1 test was run,
| 1 failed unexpectedly.
| ## -------------------------- ##
| ## testsuite.log was created. ##
| ## -------------------------- ##
|
| Please send 'tests/testsuite.log' and all information you think might help:
|
|    To: <bugs@openvswitch.org>
|    Subject: [ovn 26.03.0] testsuite: 1011 failed
|
| You may investigate any problem if you feel able to do so, in which
| case the test suite provides a good starting point.  Its output may
| be found below 'tests/testsuite.dir'.
|
| make[4]: *** [Makefile:4295: check-local] Error 1

Full buildlog
https://breakpoint.cc/openssl-rebuild/logs-4/attempted/ovn_26.03.0-2_amd64-2026-04-19T08:55:22Z

Sebastian