diff --git a/pkgs/development/python-modules/epc/default.nix b/pkgs/development/python-modules/epc/default.nix
index a7318528cfc7..97ff188a3623 100644
--- a/pkgs/development/python-modules/epc/default.nix
+++ b/pkgs/development/python-modules/epc/default.nix
@@ -6,14 +6,14 @@
   setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "epc";
   version = "0.0.5";
   pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "a14d2ea74817955a20eb00812e3a4630a132897eb4d976420240f1152c0d7d25";
+    inherit (finalAttrs) pname version;
+    hash = "sha256-oU0up0gXlVog6wCBLjpGMKEyiX602XZCAkDxFSwNfSU=";
   };
 
   build-system = [ setuptools ];
@@ -26,4 +26,4 @@ buildPythonPackage rec {
     homepage = "https://github.com/tkf/python-epc";
     license = lib.licenses.gpl3;
   };
-}
+})