python39Packages.doc8: fix version number

pkgs/development/python-modules/doc8/default.nix

@@ -8,6 +8,7 @@
 , pytestCheckHook
 , pythonOlder
 , restructuredtext_lint
+, setuptools-scm
 , stevedore
 }:
 
@@ -23,6 +24,10 @@ buildPythonPackage rec {
     sha256 = "376e50f4e70a1ae935416ddfcf93db35dd5d4cc0e557f2ec72f0667d0ace4548";
   };
 
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
   buildInputs = [
     pbr
   ];