Per repology, current shipping versions are:

                 RHEL-9: 3.10.1
              Debian 13: 3.10.1
       openSUSE Leap 15: 3.9.1
       Ubuntu LTS 22.04: 3.7.3
                FreeBSD: 3.10.2
              Fedora 42: 3.10.2
                OpenBSD: 3.10.2
         macOS HomeBrew: 3.10.2

Ubuntu 22.04 is our oldest constraint at this time.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index ab1ff373e6..ad0aa6ccc0 100644
--- a/meson.build
+++ b/meson.build
@@ -1869,7 +1869,7 @@ if not gnutls.found()
     crypto_sm3 = gcrypt
   endif
   if (not get_option('nettle').auto() or have_system) and not gcrypt.found()
-    nettle = dependency('nettle', version: '>=3.4',
+    nettle = dependency('nettle', version: '>=3.7.3',
                         method: 'pkg-config',
                         required: get_option('nettle'))
     if nettle.found() and not cc.has_header('nettle/xts.h', dependencies: nettle)
-- 
2.51.1