pypy3Packages.eventlet: relax greenlet

greenlet is built into pypy but the version number is older.
Since the tests do not run, we cannot be super sure that this works 100%
but some following packages built. Maybe we should bring back greenlet
to pypy as a package but that is a bigger task for another PR.

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

@@ -32,6 +32,8 @@ buildPythonPackage rec {
     hash = "sha256-fzCN+idYQ97nuDVfYn6VYQFBaaMxmnjWzFrmn+Aj+u4=";
   };
 
+  pythonRelaxDeps = lib.optionals isPyPy [ "greenlet" ];
+
   nativeBuildInputs = [
     hatch-vcs
     hatchling