systemd: drop 0010-systemd-shutdown-execute-scripts-in-etc-systemd-syst.patch

Instead set this variable via CFLAGS.

pkgs/os-specific/linux/systemd/0010-systemd-shutdown-execute-scripts-in-etc-systemd-syst.patch

@@ -1,23 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Nikolay Amiantov <ab@fmap.me>
-Date: Thu, 25 Jul 2019 20:45:55 +0300
-Subject: [PATCH] systemd-shutdown: execute scripts in
- /etc/systemd/system-shutdown
-
-This is needed for NixOS to use such scripts as systemd directory is immutable.
----
- src/shutdown/shutdown.c | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/src/shutdown/shutdown.c b/src/shutdown/shutdown.c
-index fc6df238be..cb8b45a41b 100644
---- a/src/shutdown/shutdown.c
-+++ b/src/shutdown/shutdown.c
-@@ -330,6 +330,7 @@ static void notify_supervisor(void) {
- int main(int argc, char *argv[]) {
-         static const char* const dirs[] = {
-                 SYSTEM_SHUTDOWN_PATH,
-+                "/etc/systemd/system-shutdown",
-                 NULL
-         };
-         _cleanup_free_ char *cgroup = NULL;

pkgs/os-specific/linux/systemd/default.nix

@@ -240,7 +240,6 @@ stdenv.mkDerivation (finalAttrs: {
     ./0002-Don-t-try-to-unmount-nix-or-nix-store.patch
     ./0007-Change-usr-share-zoneinfo-to-etc-zoneinfo.patch
     ./0009-add-rootprefix-to-lookup-dir-paths.patch
-    ./0010-systemd-shutdown-execute-scripts-in-etc-systemd-syst.patch
     ./0011-systemd-sleep-execute-scripts-in-etc-systemd-system-.patch
     ./0012-path-util.h-add-placeholder-for-DEFAULT_PATH_NORMAL.patch
     ./0013-inherit-systemd-environment-when-calling-generators.patch
@@ -707,12 +706,17 @@ stdenv.mkDerivation (finalAttrs: {
   # warning messages
   postConfigure = ''
     substituteInPlace config.h \
-      --replace-fail "SYSTEMD_BINARY_PATH" "_SYSTEMD_BINARY_PATH"
+      --replace-fail "SYSTEMD_BINARY_PATH" "_SYSTEMD_BINARY_PATH" \
+      --replace-fail "SYSTEM_SHUTDOWN_PATH" "_SYSTEM_SHUTDOWN_PATH"
   '';
 
   env.NIX_CFLAGS_COMPILE = toString [
     "-USYSTEMD_BINARY_PATH"
     "-DSYSTEMD_BINARY_PATH=\"/run/current-system/systemd/lib/systemd/systemd\""
+
+    # This path is not exposed via meson
+    "-USYSTEM_SHUTDOWN_PATH"
+    "-DSYSTEM_SHUTDOWN_PATH=\"/etc/systemd/system-shutdown\""
   ];
 
   doCheck = false;