The macOS builds in our CI (and possibly other very recent distros)
are currently broken since the update to libnfs version 6 there.
That version apparently comes with a big API breakage. v5.0.3 was
the final release of the old API (see the libnfs commit here:
https://github.com/sahlberg/libnfs/commit/4379837 ).

Disallow version 6.x for now to get the broken CI job working
again. Once somebody had enough time to adapt our code in
block/nfs.c, we can revert this change again.

Message-ID: <20241218065157.209020-1-thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit e2d98f257138b83b6a492d1da5847a7fe0930d10)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/meson.build b/meson.build
index 048e07a648..5bd8a35523 100644
--- a/meson.build
+++ b/meson.build
@@ -848,7 +848,7 @@ endif
 
 libnfs = not_found
 if not get_option('libnfs').auto() or have_block
-  libnfs = dependency('libnfs', version: '>=1.9.3',
+  libnfs = dependency('libnfs', version: ['>=1.9.3', '<6.0.0'],
                       required: get_option('libnfs'),
                       method: 'pkg-config')
 endif
-- 
2.39.5