diff -Nru postgresql-15-15.4/debian/changelog postgresql-15-15.4/debian/changelog
--- postgresql-15-15.4/debian/changelog	2023-08-08 08:10:20.000000000 +0000
+++ postgresql-15-15.4/debian/changelog	2023-08-10 23:53:01.000000000 +0000
@@ -1,3 +1,9 @@
+postgresql-15 (15.4-1ubuntu1) mantic; urgency=medium
+
+  * d/control: pin llvm-15 build dependencies. (LP: #2029498)
+
+ -- Athos Ribeiro <athos.ribeiro@canonical.com>  Thu, 10 Aug 2023 20:53:01 -0300
+
 postgresql-15 (15.4-1) unstable; urgency=medium
 
   * New upstream version.
diff -Nru postgresql-15-15.4/debian/control postgresql-15-15.4/debian/control
--- postgresql-15-15.4/debian/control	2023-08-08 08:10:20.000000000 +0000
+++ postgresql-15-15.4/debian/control	2023-08-10 23:53:01.000000000 +0000
@@ -1,7 +1,8 @@
 Source: postgresql-15
 Section: database
 Priority: optional
-Maintainer: Debian PostgreSQL Maintainers <team+postgresql@tracker.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian PostgreSQL Maintainers <team+postgresql@tracker.debian.org>
 Uploaders:
  Martin Pitt <mpitt@debian.org>,
  Peter Eisentraut <petere@debian.org>,
@@ -11,7 +12,7 @@
 Build-Depends:
  autoconf,
  bison,
- clang [!alpha !hppa !hurd-i386 !ia64 !kfreebsd-amd64 !kfreebsd-i386 !m68k !powerpc !riscv64 !sh4 !sparc64 !x32],
+ clang-15 [!alpha !hppa !hurd-i386 !ia64 !kfreebsd-amd64 !kfreebsd-i386 !m68k !powerpc !riscv64 !sh4 !sparc64 !x32],
  debhelper-compat (= 13),
  dh-exec (>= 0.13~),
  docbook-xml,
@@ -36,7 +37,7 @@
  libxml2-utils,
  libxslt1-dev,
  libzstd-dev (>= 1.4.0) <!pkg.postgresql.nozstd>,
- llvm-dev [!alpha !hppa !hurd-i386 !ia64 !kfreebsd-amd64 !kfreebsd-i386 !m68k !powerpc !riscv64 !sh4 !sparc64 !x32],
+ llvm-15-dev [!alpha !hppa !hurd-i386 !ia64 !kfreebsd-amd64 !kfreebsd-i386 !m68k !powerpc !riscv64 !sh4 !sparc64 !x32],
  lz4 | liblz4-tool,
  mawk,
  perl (>= 5.8),