diff --git a/pkgs/development/python-modules/zope-size/default.nix b/pkgs/development/python-modules/zope-size/default.nix
index 0d5f1a4778f0..1077201a61bd 100644
--- a/pkgs/development/python-modules/zope-size/default.nix
+++ b/pkgs/development/python-modules/zope-size/default.nix
@@ -1,12 +1,13 @@
 {
   lib,
   buildPythonPackage,
-  fetchPypi,
+  fetchFromGitHub,
   setuptools,
   zope-i18nmessageid,
   zope-interface,
   unittestCheckHook,
   zope-component,
+  zope-configuration,
   zope-security,
 }:
 
@@ -15,12 +16,18 @@ buildPythonPackage rec {
   version = "5.1";
   pyproject = true;
 
-  src = fetchPypi {
-    pname = "zope.size";
-    inherit version;
-    hash = "sha256-88OaPLxG6AnxlkGxLaFn6nzbPgWu8z9WmXOireHvgAk=";
+  src = fetchFromGitHub {
+    owner = "zopefoundation";
+    repo = "zope.size";
+    tag = version;
+    hash = "sha256-9r7l3RgE9gvxJ2I5rFvNn/XIztecXW3GseGeM3MzfTU=";
   };
 
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail "setuptools <= 75.6.0" setuptools
+  '';
+
   build-system = [ setuptools ];
 
   dependencies = [
@@ -33,6 +40,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     unittestCheckHook
     zope-component
+    zope-configuration
     zope-security
   ];