Some versions of Linux don't provide linux/blkzoned.h. In this case, attempting
to build blkzone produces an error. Suppress building of blkzone.  
Index: util-linux-2.39.2/meson.build
===================================================================
--- util-linux-2.39.2.orig/meson.build
+++ util-linux-2.39.2/meson.build
@@ -1477,16 +1477,19 @@ exes += exe
 manadocs += ['sys-utils/blkdiscard.8.adoc']
 bashcompletions += ['blkdiscard']
 
-exe = executable(
-  'blkzone',
-  blkzone_sources,
-  include_directories : includes,
-  link_with : [lib_common],
-  install_dir : sbindir,
-  install : true)
-exes += exe
-manadocs += ['sys-utils/blkzone.8.adoc']
-bashcompletions += ['blkzone']
+have = cc.has_header('linux/blkzoned.h')
+if have
+  exe = executable(
+    'blkzone',
+    blkzone_sources,
+    include_directories : includes,
+    link_with : [lib_common],
+    install_dir : sbindir,
+    install : true)
+  exes += exe
+  manadocs += ['sys-utils/blkzone.8.adoc']
+  bashcompletions += ['blkzone']
+endif
 
 exe = executable(
   'blkpr',