diff --git a/pkgs/development/python-modules/certbot-dns-google/default.nix b/pkgs/development/python-modules/certbot-dns-google/default.nix
index 1061502b7bac..ed1d24e44ba4 100644
--- a/pkgs/development/python-modules/certbot-dns-google/default.nix
+++ b/pkgs/development/python-modules/certbot-dns-google/default.nix
@@ -3,33 +3,31 @@
   acme,
   certbot,
   google-api-python-client,
-  oauth2client,
+  google-auth,
   pytestCheckHook,
-  pythonOlder,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "certbot-dns-google";
-  format = "setuptools";
-
   inherit (certbot) src version;
-  disabled = pythonOlder "3.6";
+  pyproject = true;
 
   sourceRoot = "${src.name}/certbot-dns-google";
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     acme
     certbot
     google-api-python-client
-    oauth2client
+    google-auth
   ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
   pytestFlagsArray = [
     "-p no:cacheprovider"
-    # https://github.com/certbot/certbot/issues/9988
-    "-Wignore::DeprecationWarning"
   ];
 
   meta = certbot.meta // {
diff --git a/pkgs/development/python-modules/google-api-python-client/default.nix b/pkgs/development/python-modules/google-api-python-client/default.nix
index a076455e7a50..af7c4d31284c 100644
--- a/pkgs/development/python-modules/google-api-python-client/default.nix
+++ b/pkgs/development/python-modules/google-api-python-client/default.nix
@@ -7,7 +7,6 @@
   google-api-core,
   httplib2,
   uritemplate,
-  oauth2client,
   setuptools,
   pythonOlder,
 }:
@@ -33,7 +32,6 @@ buildPythonPackage rec {
     google-api-core
     httplib2
     uritemplate
-    oauth2client
   ];
 
   # No tests included in archive
diff --git a/pkgs/development/python-modules/google-auth/default.nix b/pkgs/development/python-modules/google-auth/default.nix
index 095159884bf4..11113fa11ed5 100644
--- a/pkgs/development/python-modules/google-auth/default.nix
+++ b/pkgs/development/python-modules/google-auth/default.nix
@@ -11,7 +11,6 @@
   freezegun,
   grpcio,
   mock,
-  oauth2client,
   pyasn1-modules,
   pyjwt,
   pyopenssl,
@@ -68,24 +67,17 @@ buildPythonPackage rec {
     requests = [ requests ];
   };
 
-  nativeCheckInputs =
-    [
-      aioresponses
-      flask
-      freezegun
-      grpcio
-      mock
-    ]
-    ++ lib.optionals (pythonOlder "3.13") [
-      oauth2client
-    ]
-    ++ [
-      pytest-asyncio
-      pytest-localserver
-      pytestCheckHook
-      responses
-    ]
-    ++ lib.flatten (lib.attrValues optional-dependencies);
+  nativeCheckInputs = [
+    aioresponses
+    flask
+    freezegun
+    grpcio
+    mock
+    pytest-asyncio
+    pytest-localserver
+    pytestCheckHook
+    responses
+  ] ++ lib.flatten (lib.attrValues optional-dependencies);
 
   pythonImportsCheck = [
     "google.auth"