diff --git a/pkgs/by-name/ut/util-linux/include-correct-struct-statfs-header.patch b/pkgs/by-name/ut/util-linux/include-correct-struct-statfs-header.patch
new file mode 100644
index 000000000000..6787ef311abf
--- /dev/null
+++ b/pkgs/by-name/ut/util-linux/include-correct-struct-statfs-header.patch
@@ -0,0 +1,61 @@
+From 145b6a66dcc725de3c3161db62db7047eb407214 Mon Sep 17 00:00:00 2001
+From: Morgan Jones <me@numin.it>
+Date: Sun, 5 Apr 2026 18:03:54 -0700
+Subject: [PATCH] pidfd-utils: include correct struct statfs header for darwin
+
+Fixes the build on Darwin since struct statfs is in sys/mount.h
+and sys/vfs.h doesn't even exist. Just conditionally include all the
+headers.
+---
+ include/statfs_magic.h | 16 ++++++++++++++++
+ lib/pidfd-utils.c      |  3 ---
+ 2 files changed, 16 insertions(+), 3 deletions(-)
+
+diff --git a/include/statfs_magic.h b/include/statfs_magic.h
+index 6921abaa4..28977f392 100644
+--- a/include/statfs_magic.h
++++ b/include/statfs_magic.h
+@@ -5,10 +5,26 @@
+ #ifndef UTIL_LINUX_STATFS_MAGIC_H
+ #define UTIL_LINUX_STATFS_MAGIC_H
+ 
++#ifdef HAVE_SYS_TYPES_H
++# include <sys/types.h>
++#endif
++
++#ifdef HAVE_SYS_STAT_H
++# include <sys/stat.h>
++#endif
++
+ #ifdef HAVE_SYS_STATFS_H
+ # include <sys/statfs.h>
+ #endif
+ 
++#ifdef HAVE_SYS_VFS_H
++# include <sys/vfs.h>
++#endif
++
++#ifdef HAVE_SYS_MOUNT_H
++# include <sys/mount.h>
++#endif
++
+ /*
+  * If possible then don't depend on internal libc __SWORD_TYPE type.
+  */
+diff --git a/lib/pidfd-utils.c b/lib/pidfd-utils.c
+index a83735920..f7c649144 100644
+--- a/lib/pidfd-utils.c
++++ b/lib/pidfd-utils.c
+@@ -5,9 +5,6 @@
+  * Authors: Christian Goeschel Ndjomouo <cgoesc2@wgu.edu> [2025]
+  */
+ #include <stdlib.h>
+-#include <sys/stat.h>
+-#include <sys/vfs.h>
+-#include <sys/types.h>
+ #include <errno.h>
+ #include <err.h>
+ 
+-- 
+2.50.1
+
diff --git a/pkgs/by-name/ut/util-linux/package.nix b/pkgs/by-name/ut/util-linux/package.nix
index 9306eaeac78c..0751a15cfbc3 100644
--- a/pkgs/by-name/ut/util-linux/package.nix
+++ b/pkgs/by-name/ut/util-linux/package.nix
@@ -55,6 +55,10 @@ stdenv.mkDerivation (finalAttrs: {
     # which isn't valid on NixOS (and a compatibility link on most other modern
     # distros anyway).
     ./rtcwake-search-PATH-for-shutdown.patch
+
+    # Fix compile of 2.42+ on Darwin.
+    # https://lore.kernel.org/util-linux/CAEUYr6ZjVX1bd-xcBGtFN_ZYwQnXDYsw7d1-7sTpF2BbgfrR+g@mail.gmail.com/T/#u
+    ./include-correct-struct-statfs-header.patch
   ];
 
   # We separate some of the utilities into their own outputs. This