diff --git a/sdk_container/src/third_party/portage-stable/dev-libs/glib/files/glib-2.78.4-libpcre2-10.43.patch b/sdk_container/src/third_party/portage-stable/dev-libs/glib/files/glib-2.78.4-libpcre2-10.43.patch
new file mode 100644
index 0000000000..27dce8f406
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/dev-libs/glib/files/glib-2.78.4-libpcre2-10.43.patch
@@ -0,0 +1,45 @@
+https://gitlab.gnome.org/GNOME/glib/-/merge_requests/3945
+
+From cce3ae98a2c1966719daabff5a4ec6cf94a846f6 Mon Sep 17 00:00:00 2001
+From: Philip Withnall <pwithnall@gnome.org>
+Date: Mon, 26 Feb 2024 16:55:44 +0000
+Subject: [PATCH] tests: Remove variable-length lookbehind tests for GRegex
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+PCRE2 10.43 has now introduced support for variable-length lookbehind,
+so these tests now fail if GLib is built against PCRE2 10.43 or higher.
+
+See
+https://github.com/PCRE2Project/pcre2/blob/e8db6fa7137f4c6f66cb87e0a3c9467252ec1ef7/ChangeLog#L94.
+
+Rather than making the tests conditional on the version of PCRE2 in use,
+just remove them. They are mostly testing the PCRE2 code rather than
+any code in GLib, so don’t have much value.
+
+This should fix CI runs on msys2-mingw32, which updated to PCRE2 10.43 2
+days ago.
+
+Signed-off-by: Philip Withnall <pwithnall@gnome.org>
+--- a/glib/tests/regex.c
++++ b/glib/tests/regex.c
+@@ -1885,16 +1885,6 @@ test_lookbehind (void)
+   g_match_info_free (match);
+   g_regex_unref (regex);
+ 
+-  regex = g_regex_new ("(?<!dogs?|cats?) x", G_REGEX_OPTIMIZE, G_REGEX_MATCH_DEFAULT, &error);
+-  g_assert (regex == NULL);
+-  g_assert_error (error, G_REGEX_ERROR, G_REGEX_ERROR_VARIABLE_LENGTH_LOOKBEHIND);
+-  g_clear_error (&error);
+-
+-  regex = g_regex_new ("(?<=ab(c|de)) foo", G_REGEX_OPTIMIZE, G_REGEX_MATCH_DEFAULT, &error);
+-  g_assert (regex == NULL);
+-  g_assert_error (error, G_REGEX_ERROR, G_REGEX_ERROR_VARIABLE_LENGTH_LOOKBEHIND);
+-  g_clear_error (&error);
+-
+   regex = g_regex_new ("(?<=abc|abde)foo", G_REGEX_OPTIMIZE, G_REGEX_MATCH_DEFAULT, &error);
+   g_assert (regex);
+   g_assert_no_error (error);
+-- 
+GitLab
diff --git a/sdk_container/src/third_party/portage-stable/dev-libs/glib/glib-2.78.4-r1.ebuild b/sdk_container/src/third_party/portage-stable/dev-libs/glib/glib-2.78.4-r1.ebuild
index a6f0241faa..87da23b245 100644
--- a/sdk_container/src/third_party/portage-stable/dev-libs/glib/glib-2.78.4-r1.ebuild
+++ b/sdk_container/src/third_party/portage-stable/dev-libs/glib/glib-2.78.4-r1.ebuild
@@ -16,7 +16,7 @@ IUSE="dbus debug +elf gtk-doc +mime selinux static-libs sysprof systemtap test u
 RESTRICT="!test? ( test )"
 REQUIRED_USE="gtk-doc? ( test )" # Bug #777636
 
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ppc64 ~riscv ~s390 sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
 
 # * elfutils (via libelf) does not build on Windows. gresources are not embedded
 # within ELF binaries on that platform anyway and inspecting ELF binaries from
@@ -73,6 +73,7 @@ MULTILIB_CHOST_TOOLS=(
 PATCHES=(
 	"${FILESDIR}"/${PN}-2.64.1-mark-gdbus-server-auth-test-flaky.patch
 	"${FILESDIR}"/${PN}-2.78.4-distutils.patch
+	"${FILESDIR}"/${PN}-2.78.4-libpcre2-10.43.patch
 )
 
 python_check_deps() {
@@ -187,7 +188,7 @@ multilib_src_configure() {
 	#fi
 
 	local emesonargs=(
-		-Dbuildtype=$(usex debug debug plain)
+		$(meson_feature debug glib_debug)
 		-Ddefault_library=$(usex static-libs both shared)
 		-Druntime_dir="${EPREFIX}"/run
 		$(meson_feature selinux)