diff --git a/python/python-pdm-backend/.SRCINFO b/python/python-pdm-backend/.SRCINFO
index aca41eea2a..7da2f09fda 100644
--- a/python/python-pdm-backend/.SRCINFO
+++ b/python/python-pdm-backend/.SRCINFO
@@ -1,6 +1,6 @@
 pkgbase = python-pdm-backend
 	pkgdesc = The build backend used by PDM that supports latest packaging standards
-	pkgver = 2.3.3
+	pkgver = 2.4.3
 	pkgrel = 2
 	url = https://github.com/pdm-project/pdm-backend
 	arch = any
@@ -19,11 +19,11 @@ pkgbase = python-pdm-backend
 	depends = python-tomli-w
 	optdepends = python-setuptools: for setuptools support
 	optdepends = python-editables: for editables backend support
-	source = pdm-backend-2.3.3.tar.gz::https://github.com/pdm-project/pdm-backend/archive/refs/tags/2.3.3.tar.gz
-	source = python-pdm-backend-2.3.1-devendor.patch
-	sha256sums = 074a42eecb19fdf0231cf51ddcb596dc5ad9e22f60af3453db4423490841ef0e
-	sha256sums = ebf0d469df8b2f436bd55d633576f417a1f9cec5881b71cc709630ec0be3c02b
-	b2sums = 14f2584f22f1c4e08f687c77621269ae1e5acfe4babb1ab427c10d65ff07841b8175479f867870b9a5745db76444ca140a7da497a94c831ca6d0ea1e67b4e88f
-	b2sums = 25f63c4f6a2559ca763c92ec9cbe7ddb6de15d420222ad5c88875a0e11a0f79dd2a7725bd2b7a4f0834839d1c2bebfdd6097c8e1d7254ae75489f009f44c9cee
+	source = pdm-backend-2.4.3.tar.gz::https://github.com/pdm-project/pdm-backend/archive/refs/tags/2.4.3.tar.gz
+	source = python-pdm-backend-2.4.3-devendor.patch
+	sha256sums = a97486ff2954a8e05fb04bc8257cc8c2da65a9cafd372d6c3c037a2d30ea6630
+	sha256sums = 2bc1924abc74c66ea3056ddefdcf7a7e9b76c4ca9f87a0bbddc1a5da73a99eaa
+	b2sums = 36f65db90de5b507348a2a8407ae0eec8e1939c6b0fea1181548de910fad2497594e17aee7d478572a32e28260ef15660bddfaec4d921b2975b5a51da031dc1e
+	b2sums = c65bd035b0caad6b18059de5fec99ee358dc2e5552de9349e9d2c1166f95d6bd9615a0087f0003ff828002eb0ea0a36461db148acb694a0ac6ec469235724aa6
 
 pkgname = python-pdm-backend
diff --git a/python/python-pdm-backend/PKGBUILD b/python/python-pdm-backend/PKGBUILD
index 49a10558ac..f1f13156ab 100644
--- a/python/python-pdm-backend/PKGBUILD
+++ b/python/python-pdm-backend/PKGBUILD
@@ -5,7 +5,7 @@
 _devendored=1
 _name=pdm-backend
 pkgname=python-pdm-backend
-pkgver=2.3.3
+pkgver=2.4.3
 pkgrel=2
 pkgdesc="The build backend used by PDM that supports latest packaging standards"
 arch=(any)
@@ -40,16 +40,16 @@ optdepends=(
 )
 source=(
   $_name-$pkgver.tar.gz::$url/archive/refs/tags/$pkgver.tar.gz
-  $pkgname-2.3.1-devendor.patch
+  $pkgname-2.4.3-devendor.patch
 )
-sha256sums=('074a42eecb19fdf0231cf51ddcb596dc5ad9e22f60af3453db4423490841ef0e'
-            'ebf0d469df8b2f436bd55d633576f417a1f9cec5881b71cc709630ec0be3c02b')
-b2sums=('14f2584f22f1c4e08f687c77621269ae1e5acfe4babb1ab427c10d65ff07841b8175479f867870b9a5745db76444ca140a7da497a94c831ca6d0ea1e67b4e88f'
-        '25f63c4f6a2559ca763c92ec9cbe7ddb6de15d420222ad5c88875a0e11a0f79dd2a7725bd2b7a4f0834839d1c2bebfdd6097c8e1d7254ae75489f009f44c9cee')
+sha256sums=('a97486ff2954a8e05fb04bc8257cc8c2da65a9cafd372d6c3c037a2d30ea6630'
+            '2bc1924abc74c66ea3056ddefdcf7a7e9b76c4ca9f87a0bbddc1a5da73a99eaa')
+b2sums=('36f65db90de5b507348a2a8407ae0eec8e1939c6b0fea1181548de910fad2497594e17aee7d478572a32e28260ef15660bddfaec4d921b2975b5a51da031dc1e'
+        'c65bd035b0caad6b18059de5fec99ee358dc2e5552de9349e9d2c1166f95d6bd9615a0087f0003ff828002eb0ea0a36461db148acb694a0ac6ec469235724aa6')
 
 prepare() {
   if (( _devendored == 1 )); then
-    patch -Np1 -d $_name-$pkgver -i ../$pkgname-2.3.1-devendor.patch
+    patch -Np1 -d $_name-$pkgver -i ../$pkgname-2.4.3-devendor.patch
     rm -frv $_name-$pkgver/src/pdm/backend/_vendor
   fi
 }
diff --git a/python/python-pdm-backend/python-pdm-backend-2.4.3-devendor.patch b/python/python-pdm-backend/python-pdm-backend-2.4.3-devendor.patch
new file mode 100644
index 0000000000..9a22a080f2
--- /dev/null
+++ b/python/python-pdm-backend/python-pdm-backend-2.4.3-devendor.patch
@@ -0,0 +1,151 @@
+diff --git i/src/pdm/backend/base.py w/src/pdm/backend/base.py
+index e4a75b8..c14417b 100644
+--- i/src/pdm/backend/base.py
++++ w/src/pdm/backend/base.py
+@@ -16,7 +16,7 @@ from typing import (
+     cast,
+ )
+ 
+-from pdm.backend._vendor.pyproject_metadata import StandardMetadata
++from pyproject_metadata import StandardMetadata
+ from pdm.backend.config import Config
+ from pdm.backend.hooks import BuildHookInterface, Context
+ from pdm.backend.hooks.version import DynamicVersionBuildHook
+diff --git i/src/pdm/backend/config.py w/src/pdm/backend/config.py
+index 382e5f4..e8efdbf 100644
+--- i/src/pdm/backend/config.py
++++ w/src/pdm/backend/config.py
+@@ -7,8 +7,8 @@ from functools import cached_property
+ from pathlib import Path
+ from typing import TYPE_CHECKING, Any, TypeVar
+ 
+-from pdm.backend._vendor import tomli_w
+-from pdm.backend._vendor.pyproject_metadata import ConfigurationError, StandardMetadata
++import tomli_w
++from pyproject_metadata import ConfigurationError, StandardMetadata
+ from pdm.backend.exceptions import ConfigError, ValidationError
+ from pdm.backend.structures import Table
+ from pdm.backend.utils import find_packages_iter, is_relative_path
+@@ -16,7 +16,7 @@ from pdm.backend.utils import find_packages_iter, is_relative_path
+ if sys.version_info >= (3, 11):
+     import tomllib
+ else:
+-    import pdm.backend._vendor.tomli as tomllib
++    import tomli as tomllib
+ 
+ T = TypeVar("T")
+ 
+diff --git i/src/pdm/backend/editable.py w/src/pdm/backend/editable.py
+index 379699d..10a316d 100644
+--- i/src/pdm/backend/editable.py
++++ w/src/pdm/backend/editable.py
+@@ -4,8 +4,8 @@ import os
+ import warnings
+ from pathlib import Path
+ 
+-from pdm.backend._vendor.editables import EditableProject
+-from pdm.backend._vendor.packaging.utils import canonicalize_name
++from editables import EditableProject
++from packaging.utils import canonicalize_name
+ from pdm.backend.exceptions import ConfigError, PDMWarning
+ from pdm.backend.hooks.base import Context
+ from pdm.backend.utils import to_filename
+diff --git i/src/pdm/backend/hooks/version/__init__.py w/src/pdm/backend/hooks/version/__init__.py
+index d3b7856..d26e1f6 100644
+--- i/src/pdm/backend/hooks/version/__init__.py
++++ w/src/pdm/backend/hooks/version/__init__.py
+@@ -7,7 +7,7 @@ import warnings
+ from pathlib import Path
+ from typing import Callable
+ 
+-from pdm.backend._vendor.packaging.version import Version
++from packaging.version import Version
+ from pdm.backend.exceptions import ConfigError, PDMWarning, ValidationError
+ from pdm.backend.hooks.base import Context
+ from pdm.backend.hooks.version.scm import SCMVersion as SCMVersion
+diff --git i/src/pdm/backend/hooks/version/scm.py w/src/pdm/backend/hooks/version/scm.py
+index f6da7a7..d5fc2d4 100644
+--- i/src/pdm/backend/hooks/version/scm.py
++++ w/src/pdm/backend/hooks/version/scm.py
+@@ -16,7 +16,7 @@ from datetime import datetime, timezone
+ from pathlib import Path
+ from typing import TYPE_CHECKING, NamedTuple
+ 
+-from pdm.backend._vendor.packaging.version import Version
++from packaging.version import Version
+ 
+ if TYPE_CHECKING:
+     from _typeshed import StrPath
+diff --git i/src/pdm/backend/intree.py w/src/pdm/backend/intree.py
+index c730c17..26a1e78 100644
+--- i/src/pdm/backend/intree.py
++++ w/src/pdm/backend/intree.py
+@@ -16,7 +16,7 @@ from pdm.backend import (
+ if sys.version_info >= (3, 11):
+     import tomllib
+ else:
+-    import pdm.backend._vendor.tomli as tomllib
++    import tomli as tomllib
+ 
+ 
+ def get_requires_for_build_wheel(
+diff --git i/src/pdm/backend/sdist.py w/src/pdm/backend/sdist.py
+index b86be89..7c936b1 100644
+--- i/src/pdm/backend/sdist.py
++++ w/src/pdm/backend/sdist.py
+@@ -8,7 +8,7 @@ from pathlib import Path
+ from posixpath import join as pjoin
+ from typing import Iterable
+ 
+-from pdm.backend._vendor.packaging.utils import canonicalize_name
++from packaging.utils import canonicalize_name
+ from pdm.backend.base import Builder
+ from pdm.backend.hooks import Context
+ from pdm.backend.utils import normalize_file_permissions, safe_version, to_filename
+diff --git i/src/pdm/backend/utils.py w/src/pdm/backend/utils.py
+index 3893011..9b76182 100644
+--- i/src/pdm/backend/utils.py
++++ w/src/pdm/backend/utils.py
+@@ -13,9 +13,9 @@ from fnmatch import fnmatchcase
+ from pathlib import Path
+ from typing import Any, Callable, Generator, Iterable, Match
+ 
+-from pdm.backend._vendor.packaging.markers import Marker
+-from pdm.backend._vendor.packaging.requirements import Requirement
+-from pdm.backend._vendor.packaging.version import InvalidVersion, Version
++from packaging.markers import Marker
++from packaging.requirements import Requirement
++from packaging.version import InvalidVersion, Version
+ from pdm.backend.exceptions import ConfigError
+ 
+ 
+diff --git i/src/pdm/backend/wheel.py w/src/pdm/backend/wheel.py
+index 6cd743c..6837afd 100644
+--- i/src/pdm/backend/wheel.py
++++ w/src/pdm/backend/wheel.py
+@@ -15,9 +15,9 @@ from importlib.metadata import version as get_version
+ from pathlib import Path
+ from typing import IO, Any, Iterable, Mapping, NamedTuple, cast
+ 
+-from pdm.backend._vendor.packaging import tags
+-from pdm.backend._vendor.packaging.specifiers import SpecifierSet
+-from pdm.backend._vendor.packaging.utils import _build_tag_regex, canonicalize_name
++from packaging import tags
++from packaging.specifiers import SpecifierSet
++from packaging.utils import _build_tag_regex, canonicalize_name
+ from pdm.backend.base import Builder
+ from pdm.backend.hooks import Context
+ from pdm.backend.hooks.setuptools import SetuptoolsBuildHook
+diff --git i/tests/pdm/backend/hooks/version/test_scm.py w/tests/pdm/backend/hooks/version/test_scm.py
+index a3c995b..366d9ac 100644
+--- i/tests/pdm/backend/hooks/version/test_scm.py
++++ w/tests/pdm/backend/hooks/version/test_scm.py
+@@ -12,7 +12,7 @@ from typing import cast
+ 
+ import pytest
+ 
+-from pdm.backend._vendor.packaging.version import Version
++from packaging.version import Version
+ from pdm.backend.hooks.version.scm import (
+     SCMVersion,
+     default_version_formatter,