diff --git a/pkgs/development/python-modules/pbs-installer/default.nix b/pkgs/development/python-modules/pbs-installer/default.nix
new file mode 100644
index 000000000000..ab892b5260e7
--- /dev/null
+++ b/pkgs/development/python-modules/pbs-installer/default.nix
@@ -0,0 +1,50 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, pdm-backend
+, httpx
+, zstandard
+}:
+
+buildPythonPackage rec {
+  pname = "pbs-installer";
+  version = "2024.4.1";
+  pyproject = true;
+
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "frostming";
+    repo = "pbs-installer";
+    rev = version;
+    hash = "sha256-0LuajPD/sM0LoyRoCkGJ9medUcWNEPqvY76GgK2rIac=";
+  };
+
+  build-system = [
+    pdm-backend
+  ];
+
+  optional-dependencies = {
+    all = optional-dependencies.install ++ optional-dependencies.download;
+    download = [
+      httpx
+    ];
+    install = [
+      zstandard
+    ];
+  };
+
+  pythonImportsCheck = [ "pbs_installer" ];
+
+  # upstream has no test
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Installer for Python Build Standalone";
+    homepage = "https://github.com/frostming/pbs-installer";
+    changelog = "https://github.com/frostming/pbs-installer/releases/tag/${version}";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}
diff --git a/pkgs/development/python-modules/unearth/default.nix b/pkgs/development/python-modules/unearth/default.nix
index 60307ca4051d..0527e90f2636 100644
--- a/pkgs/development/python-modules/unearth/default.nix
+++ b/pkgs/development/python-modules/unearth/default.nix
@@ -2,12 +2,12 @@
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
-, cached-property
 , packaging
 , pdm-backend
-, requests
+, httpx
 , flask
 , pytest-httpserver
+, pytest-mock
 , pytestCheckHook
 , requests-wsgi-adapter
 , trustme
@@ -15,23 +15,23 @@
 
 buildPythonPackage rec {
   pname = "unearth";
-  version = "0.14.0";
-  format = "pyproject";
+  version = "0.15.1";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-883fuUrA+GX7z5ZCMVVu9xgwEDecALASBVF6UMeKGG0=";
+    hash = "sha256-hj3rMznA1lpb4NCtLGfUbV9XSnmOdO8FUr8R0pijCrs=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     pdm-backend
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     packaging
-    requests
+    httpx
   ];
 
   __darwinAllowLocalNetworking = true;
@@ -39,6 +39,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     flask
     pytest-httpserver
+    pytest-mock
     pytestCheckHook
     requests-wsgi-adapter
     trustme
diff --git a/pkgs/tools/package-management/pdm/default.nix b/pkgs/tools/package-management/pdm/default.nix
index 88ed0768b1d8..fd8539da9654 100644
--- a/pkgs/tools/package-management/pdm/default.nix
+++ b/pkgs/tools/package-management/pdm/default.nix
@@ -1,8 +1,6 @@
 { lib
-, stdenv
 , python3
 , fetchFromGitHub
-, fetchpatch
 , fetchPypi
 , nix-update-script
 , runtimeShell
@@ -35,41 +33,46 @@ in
 with python.pkgs;
 buildPythonApplication rec {
   pname = "pdm";
-  version = "2.12.4";
+  version = "2.13.2";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-0Eh3Ni+Vz5/8HSw4uFH2k3BuSSiEDkiYauV22tV0FJY=";
+    hash = "sha256-4oK/HK8KCD/A+16JrW9518V5/1LHu1juhYfqPVu54Uo=";
   };
 
   nativeBuildInputs = [
-    pdm-backend
     installShellFiles
   ];
 
-  propagatedBuildInputs = [
+  build-system = [
+    pdm-backend
+  ];
+
+  dependencies = [
     blinker
-    certifi
-    cachecontrol
     dep-logic
+    filelock
     findpython
+    hishel
+    httpx
     installer
+    msgpack
     packaging
+    pbs-installer
     platformdirs
     pyproject-hooks
     python-dotenv
-    requests-toolbelt
     resolvelib
     rich
     shellingham
     tomlkit
     unearth
     virtualenv
-  ]
-  ++ cachecontrol.optional-dependencies.filecache
+  ] ++ httpx.optional-dependencies.socks
+  ++ pbs-installer.optional-dependencies.install
   ++ lib.optionals (pythonOlder "3.11") [
     tomli
   ]
@@ -100,7 +103,6 @@ buildPythonApplication rec {
   nativeCheckInputs = [
     pytestCheckHook
     pytest-mock
-    pytest-rerunfailures
     pytest-xdist
     pytest-httpserver
   ] ++ lib.optional stdenv.isLinux first;
@@ -120,7 +122,9 @@ buildPythonApplication rec {
     "test_convert_setup_py_project"
     # pythonfinder isn't aware of nix's python infrastructure
     "test_use_wrapper_python"
-    "test_use_invalid_wrapper_python"
+
+    # touches the network
+    "test_find_candidates_from_find_links"
   ];
 
   __darwinAllowLocalNetworking = true;
@@ -134,7 +138,7 @@ buildPythonApplication rec {
   meta = with lib; {
     homepage = "https://pdm-project.org";
     changelog = "https://github.com/pdm-project/pdm/releases/tag/${version}";
-    description = "A modern Python package manager with PEP 582 support";
+    description = "A modern Python package and dependency manager supporting the latest PEP standards";
     license = licenses.mit;
     maintainers = with maintainers; [ cpcloud ];
     mainProgram = "pdm";
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ef9e4c34b621..a52fb2bc6cd0 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9432,6 +9432,8 @@ self: super: with self; {
 
   pbr = callPackage ../development/python-modules/pbr { };
 
+  pbs-installer = callPackage ../development/python-modules/pbs-installer { };
+
   pc-ble-driver-py = toPythonModule (callPackage ../development/python-modules/pc-ble-driver-py { });
 
   pcapy-ng = callPackage ../development/python-modules/pcapy-ng {