From 3276170e6b04df2bd7a1c2deb8914688f6e1e99c Mon Sep 17 00:00:00 2001
From: Boris Nagaev <bnagaev@gmail.com>
Date: Fri, 2 Jan 2026 17:37:34 -0500
Subject: [PATCH] daemonize: fix build

Include PR https://github.com/bmc/daemonize/pull/39
It fixes daemonize after GCC update to 15.
---
 .../da/daemonize/include-write-prototype.patch    | 15 +++++++++++++++
 pkgs/by-name/da/daemonize/package.nix             |  7 +++++++
 2 files changed, 22 insertions(+)
 create mode 100644 pkgs/by-name/da/daemonize/include-write-prototype.patch

diff --git a/pkgs/by-name/da/daemonize/include-write-prototype.patch b/pkgs/by-name/da/daemonize/include-write-prototype.patch
new file mode 100644
index 000000000000..21652c9f53cd
--- /dev/null
+++ b/pkgs/by-name/da/daemonize/include-write-prototype.patch
@@ -0,0 +1,15 @@
+diff --git a/getopt.c b/getopt.c
+index 9b27812..3fac396 100644
+--- a/getopt.c
++++ b/getopt.c
+@@ -43,9 +43,9 @@
+ #include <stdio.h>
+ /* We're ANSI now; we're guaranteed to have strchr(). */
+ #include <string.h>
++#include <unistd.h>
+ 
+ #define ERR(s, c)	if(x_opterr){\
+-	extern int write();\
+ 	char errbuf[2];\
+ 	errbuf[0] = c; errbuf[1] = '\n';\
+ 	(void) write(2, argv[0], (unsigned)strlen(argv[0]));\
diff --git a/pkgs/by-name/da/daemonize/package.nix b/pkgs/by-name/da/daemonize/package.nix
index 7f6e2f82acdb..be5daa3c708b 100644
--- a/pkgs/by-name/da/daemonize/package.nix
+++ b/pkgs/by-name/da/daemonize/package.nix
@@ -15,6 +15,13 @@ stdenv.mkDerivation rec {
     sha256 = "1e6LZXf/lK7sB2CbXwOg7LOi0Q8IBQNAa4d7rX0Ej3A=";
   };
 
+  patches = [
+    # conbination of:
+    # https://github.com/bmc/daemonize/commit/eaf4746d47e171e7b8655690eb1e91fc216f2866
+    # https://github.com/bmc/daemonize/pull/39
+    ./include-write-prototype.patch
+  ];
+
   meta = {
     description = "Runs a command as a Unix daemon";
     homepage = "http://software.clapper.org/daemonize/";