diff --git a/pkgs/development/python-modules/py-cpuinfo/default.nix b/pkgs/development/python-modules/py-cpuinfo/default.nix
index 662ea8453ff1..e67b9c3486ea 100644
--- a/pkgs/development/python-modules/py-cpuinfo/default.nix
+++ b/pkgs/development/python-modules/py-cpuinfo/default.nix
@@ -3,6 +3,7 @@
   stdenv,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   pytestCheckHook,
   pythonOlder,
   sysctl,
@@ -10,20 +11,18 @@
 
 buildPythonPackage rec {
   pname = "py-cpuinfo";
-  version = "9.0.0";
-  format = "setuptools";
+  version = "9.0.0-unstable-2022-11-20";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "workhorsy";
     repo = "py-cpuinfo";
-    rev = "v${version}";
-    hash = "sha256-Q5u0guAqDVhf6bvJTzNvCpWbIzjxxAjE7s0OuXj9T4Q=";
+    rev = "f3f0fec58335b9699b9b294267c15f516045b1fe";
+    hash = "sha256-oORoJNnbKLNmdqoyVhW6WbI4p2G7oMDhtTqeDvaDiGQ=";
   };
 
-  nativeCheckInputs = [ pytestCheckHook ];
-
   # On Darwin sysctl is used to read CPU information.
   postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
     substituteInPlace cpuinfo/cpuinfo.py \
@@ -31,6 +30,10 @@ buildPythonPackage rec {
       --replace "_run_and_get_stdout(['sysctl'" "_run_and_get_stdout(['${sysctl}/bin/sysctl'"
   '';
 
+  build-system = [ setuptools ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
   pythonImportsCheck = [ "cpuinfo" ];
 
   meta = {