A way of reverting this upstream change:
https://gitlab.freedesktop.org/dbus/dbus/-/merge_requests/398

Fixes https://github.com/termux/termux-packages/issues/23981

--- a/meson.build
+++ b/meson.build
@@ -810,13 +810,7 @@ config.set('HAVE_FSTATFS',
     )
 )
 
-config.set10('HAVE_DECL_SYS_PIDFD_OPEN',
-    cc.has_header_symbol(
-        'sys/syscall.h',
-        'SYS_pidfd_open',
-        args: compile_args_c,
-    )
-)
+config.set10('HAVE_DECL_SYS_PIDFD_OPEN', false)
 
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