diff --git a/pkgs/development/python-modules/python-axolotl-curve25519/default.nix b/pkgs/development/python-modules/python-axolotl-curve25519/default.nix
index cb2185845e65..6dfdab632d04 100644
--- a/pkgs/development/python-modules/python-axolotl-curve25519/default.nix
+++ b/pkgs/development/python-modules/python-axolotl-curve25519/default.nix
@@ -2,22 +2,34 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  fetchpatch,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "python-axolotl-curve25519";
   version = "0.4.1.post2";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "0705a66297ebd2f508a60dc94e22881c754301eb81db93963322f6b3bdcb63a3";
   };
 
-  meta = with lib; {
+  patches = [
+    # https://github.com/tgalal/python-axolotl-curve25519/pull/26
+    (fetchpatch {
+      url = "https://github.com/tgalal/python-axolotl-curve25519/commit/901f4fb12e1290b72fbd26ea1f40755b079fa241.patch";
+      hash = "sha256-hdhaOysRXI9q5D9e/bfy0887bpEFSvUyrbl32nBgteQ=";
+    })
+  ];
+
+  build-system = [ setuptools ];
+
+  meta = {
     homepage = "https://github.com/tgalal/python-axolotl-curve25519";
     description = "Curve25519 with ed25519 signatures";
-    maintainers = with maintainers; [ abbradar ];
-    license = licenses.gpl3;
+    maintainers = with lib.maintainers; [ abbradar ];
+    license = lib.licenses.gpl3;
   };
 }