diff -Nru jack-capture-0.9.73/debian/changelog jack-capture-0.9.73/debian/changelog
--- jack-capture-0.9.73/debian/changelog	2023-09-18 18:44:41.000000000 +0100
+++ jack-capture-0.9.73/debian/changelog	2024-01-25 20:44:18.000000000 +0000
@@ -1,3 +1,10 @@
+jack-capture (0.9.73-4ubuntu1) noble; urgency=medium
+
+  * backport upstream patch to fix FTBFS by removing custom version of
+    asprintf. (LP: #2038849)
+
+ -- Sudip Mukherjee <sudipm.mukherjee@gmail.com>  Thu, 25 Jan 2024 20:44:18 +0000
+
 jack-capture (0.9.73-4) unstable; urgency=medium
 
   * Team upload
diff -Nru jack-capture-0.9.73/debian/control jack-capture-0.9.73/debian/control
--- jack-capture-0.9.73/debian/control	2023-09-18 18:44:23.000000000 +0100
+++ jack-capture-0.9.73/debian/control	2024-01-25 20:39:51.000000000 +0000
@@ -1,7 +1,8 @@
 Source: jack-capture
 Section: sound
 Priority: optional
-Maintainer: Debian Multimedia Maintainers <debian-multimedia@lists.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Multimedia Maintainers <debian-multimedia@lists.debian.org>
 Uploaders:
  Jaromír Mikeš <mira.mikes@seznam.cz>,
  Adrian Knoth <adi@drcomp.erfurt.thur.de>
diff -Nru jack-capture-0.9.73/debian/patches/06-fix_asprintf.patch jack-capture-0.9.73/debian/patches/06-fix_asprintf.patch
--- jack-capture-0.9.73/debian/patches/06-fix_asprintf.patch	1970-01-01 01:00:00.000000000 +0100
+++ jack-capture-0.9.73/debian/patches/06-fix_asprintf.patch	2024-01-25 20:36:36.000000000 +0000
@@ -0,0 +1,72 @@
+Description: Compile with _GNU_SOURCE to avoid custom version of asprintf
+Origin: upstream, https://github.com/kmatheussen/jack_capture/commit/00c986d41dc932982d248b7c27221fccaec90f0b
+Bug-Ubuntu: https://launchpad.net/bugs/2038849
+Last-Update: 2024-01-25
+---
+
+--- jack-capture-0.9.73.orig/jack_capture.c
++++ jack-capture-0.9.73/jack_capture.c
+@@ -20,6 +20,8 @@
+ 
+ #include "das_config.h"
+ 
++#define _GNU_SOURCE 1
++
+ #include <signal.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+@@ -900,54 +902,6 @@ static void stop_helper_thread(void){
+ /////////////////////////////////////////////////////////////////////
+ 
+ 
+-#ifndef __USE_GNU
+-/* This code has been derived from an example in the glibc2 documentation.
+- * "asprintf() implementation for braindamaged operating systems"
+- * Copyright (C) 1991, 1994-1999, 2000, 2001 Free Software Foundation, Inc.
+- */
+-#ifdef _WIN32
+-#define vsnprintf _vsnprintf
+-#endif
+-#ifndef __APPLE__
+-int asprintf(char **buffer, char *fmt, ...) {
+-    /* Guess we need no more than 200 chars of space. */
+-    int size = 200;
+-    int nchars;
+-    va_list ap;
+-
+-    *buffer = (char*)malloc(size);
+-    if (*buffer == NULL) return -1;
+-
+-    /* Try to print in the allocated space. */
+-    va_start(ap, fmt);
+-    nchars = vsnprintf(*buffer, size, fmt, ap);
+-    va_end(ap);
+-
+-    if (nchars >= size)
+-    {
+-        char *tmpbuff;
+-        /* Reallocate buffer now that we know how much space is needed. */
+-        size = nchars+1;
+-        tmpbuff = (char*)realloc(*buffer, size);
+-
+-        if (tmpbuff == NULL) { /* we need to free it*/
+-            free(*buffer);
+-            return -1;
+-        }
+-
+-        *buffer=tmpbuff;
+-        /* Try again. */
+-        va_start(ap, fmt);
+-        nchars = vsnprintf(*buffer, size, fmt, ap);
+-        va_end(ap);
+-    }
+-
+-    if (nchars < 0) return nchars;
+-    return size;
+-}
+-#endif
+-#endif
+-
+ #define ARGS_ADD_ARGV(FMT,ARG) \
+   argv=(char**) realloc((void*)argv, (argc+2)*sizeof(char*)); \
+   asprintf(&argv[argc++], FMT, ARG); argv[argc] = 0;
diff -Nru jack-capture-0.9.73/debian/patches/series jack-capture-0.9.73/debian/patches/series
--- jack-capture-0.9.73/debian/patches/series	2023-09-18 18:44:23.000000000 +0100
+++ jack-capture-0.9.73/debian/patches/series	2024-01-25 20:34:52.000000000 +0000
@@ -1,2 +1,3 @@
 01-fix_hardening.patch
 05-spelling.patch
+06-fix_asprintf.patch