python3.pkgs.panflute: fix build

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

@@ -4,6 +4,7 @@
 , pyyaml
 , buildPythonPackage
 , isPy3k
+, fetchpatch
 }:
 
 buildPythonPackage rec{
@@ -16,6 +17,14 @@ buildPythonPackage rec{
     inherit pname version;
     sha256 = "8a3d5dd2a10c3aa6fa8167713fedb47400f0e8ae6ea8346fd4b599842bb1882d";
   };
+  patches = [
+    # Upstream has relaxed the version constaints for the click dependency
+    # but there hasn't been a release since then
+    (fetchpatch {
+      url = "https://github.com/sergiocorreia/panflute/commit/dee6c716a73072a968d67f8638a61de44025d8de.patch";
+      sha256 = "sha256-Kj/NTcXsSkevpfr8OwoIQi0p6ChXDM6YgYDPNHJtJZo=";
+    })
+  ];
 
   propagatedBuildInputs = [ click pyyaml ];