1 files changed, 16 insertions, 5 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/prometheus-client/default.nix b/nixpkgs/pkgs/development/python-modules/prometheus-client/default.nix
index 4c4c2338445a..e81613a7062b 100644
--- a/nixpkgs/pkgs/development/python-modules/prometheus-client/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/prometheus-client/default.nix
@@ -1,29 +1,40 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, setuptools
+, twisted
 , pytestCheckHook
 , pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "prometheus-client";
-  version = "0.19.0";
-  format = "setuptools";
+  version = "0.20.0";
+  pyproject = true;
 
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "prometheus";
     repo = "client_python";
     rev = "refs/tags/v${version}";
-    hash = "sha256-7mVqfzK0E8RQAlQyQD8/DIcPJZ52V13JqU22tsQJp+Q=";
+    hash = "sha256-IMw0mpOUzjXBy4bMTeSFMc5pdibI5lGxZHKiufjPLbM=";
   };
 
+  build-system = [
+    setuptools
+  ];
+
+  optional-dependencies.twisted = [
+    twisted
+  ];
+
   __darwinAllowLocalNetworking = true;
 
   nativeCheckInputs = [
     pytestCheckHook
-  ];
+  ]
+  ++ lib.flatten (lib.attrValues optional-dependencies);
 
   pythonImportsCheck = [
     "prometheus_client"