Docker crossbuilds are broken because c_rehash is missing. The Docker build
images obtain their package list from the spec file.
%if %{?_with_freeradius_openssl:1}%{!?_with_freeradius_openssl:0}
BuildRequires: freeradius-openssl, freeradius-openssl-devel
%else
-BuildRequires: openssl, openssl-devel
+# Need openssl-perl for c_rehash, which is used in tests. We don't currently
+# run a test step, but other tooling obtains build requirements from here.
+BuildRequires: openssl, openssl-devel, openssl-perl
%endif
BuildRequires: libcurl-devel