From 94ff2f02a40db7469e78f1e07b509a1ed63433d3 Mon Sep 17 00:00:00 2001
From: dramforever <dramforever@live.com>
Date: Sat, 11 Jul 2026 22:24:21 +0800
Subject: [PATCH 1/2] systemd: Fix path to find_program('clang', ...)
 replacement

Systemd 261 moved the location of this call, which means that this
replacement was lost, which broke cross compilation.

See https://github.com/systemd/systemd/commit/e6fc73350f9485064302e687b964f70b28b2e4f6
---
 pkgs/os-specific/linux/systemd/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/systemd/default.nix b/pkgs/os-specific/linux/systemd/default.nix
index eab1a27055ec..f7fefd8110f7 100644
--- a/pkgs/os-specific/linux/systemd/default.nix
+++ b/pkgs/os-specific/linux/systemd/default.nix
@@ -248,7 +248,7 @@ stdenv.mkDerivation (finalAttrs: {
     substituteInPlace src/basic/path-util.h --replace "@defaultPathNormal@" "${placeholder "out"}/bin/"
   ''
   + lib.optionalString withLibBPF ''
-    substituteInPlace meson.build \
+    substituteInPlace src/bpf/meson.build \
       --replace "find_program('clang'" "find_program('${stdenv.cc.targetPrefix}clang'"
   ''
   + lib.optionalString withUkify ''

From 2a0fe99286c94917de66955dd83d6620098a50bc Mon Sep 17 00:00:00 2001
From: dramforever <dramforever@live.com>
Date: Sat, 11 Jul 2026 20:34:44 +0800
Subject: [PATCH 2/2] systemd: substituteInPlace --replace-fail everywhere

This will catch if any of these replacement targets gets moved around
again.
---
 pkgs/os-specific/linux/systemd/default.nix | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/pkgs/os-specific/linux/systemd/default.nix b/pkgs/os-specific/linux/systemd/default.nix
index f7fefd8110f7..475cf78c4981 100644
--- a/pkgs/os-specific/linux/systemd/default.nix
+++ b/pkgs/os-specific/linux/systemd/default.nix
@@ -245,18 +245,18 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   postPatch = ''
-    substituteInPlace src/basic/path-util.h --replace "@defaultPathNormal@" "${placeholder "out"}/bin/"
+    substituteInPlace src/basic/path-util.h --replace-fail "@defaultPathNormal@" "${placeholder "out"}/bin/"
   ''
   + lib.optionalString withLibBPF ''
     substituteInPlace src/bpf/meson.build \
-      --replace "find_program('clang'" "find_program('${stdenv.cc.targetPrefix}clang'"
+      --replace-fail "find_program('clang'" "find_program('${stdenv.cc.targetPrefix}clang'"
   ''
   + lib.optionalString withUkify ''
     substituteInPlace src/ukify/ukify.py \
-      --replace \
+      --replace-fail \
       "'readelf'" \
       "'${targetPackages.stdenv.cc.bintools.targetPrefix}readelf'" \
-      --replace \
+      --replace-fail \
       "/usr/lib/systemd/boot/efi" \
       "$out/lib/systemd/boot/efi"
   ''
@@ -580,7 +580,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
   preConfigure = ''
     substituteInPlace src/libsystemd/sd-journal/catalog.c \
-      --replace /usr/lib/systemd/catalog/ $out/lib/systemd/catalog/
+      --replace-fail /usr/lib/systemd/catalog/ $out/lib/systemd/catalog/
   '';
 
   # These defines are overridden by CFLAGS and would trigger annoying
@@ -628,7 +628,7 @@ stdenv.mkDerivation (finalAttrs: {
 
       # Fix reference to /bin/false in the D-Bus services.
       for i in $out/share/dbus-1/system-services/*.service; do
-        substituteInPlace $i --replace /bin/false ${coreutils}/bin/false
+        substituteInPlace $i --replace-fail /bin/false ${coreutils}/bin/false
       done
 
       # For compatibility with dependents that use sbin instead of bin.