python3Packages.mkdocs-rss-plugin: add missing build input (#495756)

pkgs/development/python-modules/mkdocs-rss-plugin/default.nix

@@ -10,10 +10,11 @@
   pytest-cov-stub,
   pytestCheckHook,
   setuptools,
+  setuptools-scm,
   validator-collection,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "mkdocs-rss-plugin";
   version = "1.17.9";
   pyproject = true;
@@ -21,11 +22,14 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "Guts";
     repo = "mkdocs-rss-plugin";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-rUMjS0+895SsU7qNckLL3BprUQa/3lJDjpwhMkF0jYg=";
   };
 
-  build-system = [ setuptools ];
+  build-system = [
+    setuptools
+    setuptools-scm
+  ];
 
   dependencies = [
     cachecontrol
@@ -65,8 +69,8 @@ buildPythonPackage rec {
   meta = {
     description = "MkDocs plugin to generate a RSS feeds for created and updated pages, using git log and YAML frontmatter";
     homepage = "https://github.com/Guts/mkdocs-rss-plugin";
-    changelog = "https://github.com/Guts/mkdocs-rss-plugin/blob/${src.tag}/CHANGELOG.md";
+    changelog = "https://github.com/Guts/mkdocs-rss-plugin/blob/${finalAttrs.version}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})