diff --git a/pkgs/development/python-modules/gemfileparser2/default.nix b/pkgs/development/python-modules/gemfileparser2/default.nix
index f6a2c0877bfd..4a24fb07d7b1 100644
--- a/pkgs/development/python-modules/gemfileparser2/default.nix
+++ b/pkgs/development/python-modules/gemfileparser2/default.nix
@@ -20,6 +20,12 @@ buildPythonPackage rec {
 
   dontConfigure = true;
 
+  postPatch = ''
+    # https://github.com/nexB/gemfileparser2/pull/8
+    substituteInPlace setup.cfg \
+      --replace ">=3.6.*" ">=3.6"
+  '';
+
   nativeBuildInputs = [
     setuptools-scm
   ];