python2.pkgs.soupsieve: keep 1.9.6 for python 2

pkgs/development/python-modules/soupsieve/1.nix

@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytest
+, beautifulsoup4
+, isPy3k
+, backports_functools_lru_cache
+}:
+
+buildPythonPackage rec {
+  pname = "soupsieve";
+  version = "1.9.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "7985bacc98c34923a439967c1a602dc4f1e15f923b6fcf02344184f86cc7efaa";
+  };
+
+  checkPhase = ''
+    py.test
+  '';
+
+  checkInputs = [ pytest beautifulsoup4 ];
+
+  propagatedBuildInputs = lib.optional (!isPy3k) backports_functools_lru_cache;
+
+  # Circular test dependency on beautifulsoup4
+  doCheck = false;
+
+  meta = {
+    description = "A CSS4 selector implementation for Beautiful Soup";
+    license = lib.licenses.mit;
+    homepage = "https://github.com/facelessuser/soupsieve";
+  };
+
+}

pkgs/top-level/python-packages.nix

@@ -6349,7 +6349,10 @@ in {
 
   sorl_thumbnail = callPackage ../development/python-modules/sorl_thumbnail { };
 
-  soupsieve = callPackage ../development/python-modules/soupsieve { };
+  soupsieve = if isPy3k then
+    callPackage ../development/python-modules/soupsieve { }
+  else
+    callPackage ../development/python-modules/soupsieve/1.nix { };
 
   sphinx_rtd_theme = callPackage ../development/python-modules/sphinx_rtd_theme { };