diff --git a/pkgs/development/python-modules/aiodns/default.nix b/pkgs/development/python-modules/aiodns/default.nix
index e8cf0459bc65..54b67a88be19 100644
--- a/pkgs/development/python-modules/aiodns/default.nix
+++ b/pkgs/development/python-modules/aiodns/default.nix
@@ -6,7 +6,7 @@
   setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "aiodns";
   version = "4.0.0";
   pyproject = true;
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "saghul";
     repo = "aiodns";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-/iYkhzN01+NaUfMXaM39IvlEKfoKc29+f0S4y0y3GG8=";
   };
 
@@ -30,8 +30,8 @@ buildPythonPackage rec {
   meta = {
     description = "Simple DNS resolver for asyncio";
     homepage = "https://github.com/saghul/aiodns";
-    changelog = "https://github.com/saghul/aiodns/releases/tag/${src.tag}";
+    changelog = "https://github.com/saghul/aiodns/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})
diff --git a/pkgs/development/python-modules/pycares/default.nix b/pkgs/development/python-modules/pycares/default.nix
index 0772a8c5526d..2e60ceaf2f53 100644
--- a/pkgs/development/python-modules/pycares/default.nix
+++ b/pkgs/development/python-modules/pycares/default.nix
@@ -11,13 +11,13 @@
   tornado,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "pycares";
   version = "5.0.1";
   pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-WjwknIMEMmMUOYFfmoGEY0FvKoy9semI54dX3prnUIE=";
   };
 
@@ -47,8 +47,8 @@ buildPythonPackage rec {
   meta = {
     description = "Python interface for c-ares";
     homepage = "https://github.com/saghul/pycares";
-    changelog = "https://github.com/saghul/pycares/releases/tag/v${version}";
+    changelog = "https://github.com/saghul/pycares/releases/tag/v${finalAttrs.version}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})