diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index 4831f150f45..80354b10f3b 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchurl, zlib, xz, python2, findXMLCatalogs, libiconv, fetchpatch
-, supportPython ? (! stdenv ? cross) }:
+, pythonSupport ? (! stdenv ? cross) }:
 
 let
   python = python2;
@@ -28,10 +28,10 @@ in stdenv.mkDerivation rec {
   };
 
   outputs = [ "bin" "dev" "out" "doc" ]
-    ++ lib.optional supportPython "py";
-  propagatedBuildOutputs = "out bin" + lib.optionalString supportPython " py";
+    ++ lib.optional pythonSupport "py";
+  propagatedBuildOutputs = "out bin" + lib.optionalString pythonSupport " py";
 
-  buildInputs = lib.optional supportPython python
+  buildInputs = lib.optional pythonSupport python
     # Libxml2 has an optional dependency on liblzma.  However, on impure
     # platforms, it may end up using that from /usr/lib, and thus lack a
     # RUNPATH for that, leading to undefined references for its users.
@@ -39,7 +39,7 @@ in stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ zlib findXMLCatalogs ];
 
-  configureFlags = lib.optional supportPython "--with-python=${python}"
+  configureFlags = lib.optional pythonSupport "--with-python=${python}"
     ++ [ "--exec_prefix=$dev" ];
 
   enableParallelBuilding = true;
@@ -55,9 +55,9 @@ in stdenv.mkDerivation rec {
     propagatedBuildInputs =  [ findXMLCatalogs libiconv ];
   };
 
-  preInstall = lib.optionalString supportPython
+  preInstall = lib.optionalString pythonSupport
     ''substituteInPlace python/libxml2mod.la --replace "${python}" "$py"'';
-  installFlags = lib.optionalString supportPython
+  installFlags = lib.optionalString pythonSupport
     ''pythondir="$(py)/lib/${python.libPrefix}/site-packages"'';
 
   postFixup = ''
@@ -66,7 +66,7 @@ in stdenv.mkDerivation rec {
     moveToOutput share/man/man1 "$bin"
   '';
 
-  passthru = { inherit version; pythonSupport = supportPython; };
+  passthru = { inherit version; pythonSupport = pythonSupport; };
 
   meta = {
     homepage = http://xmlsoft.org/;
diff --git a/pkgs/development/libraries/libxslt/default.nix b/pkgs/development/libraries/libxslt/default.nix
index 2afbfc2fe99..df054319479 100644
--- a/pkgs/development/libraries/libxslt/default.nix
+++ b/pkgs/development/libraries/libxslt/default.nix
@@ -1,4 +1,9 @@
-{ stdenv, fetchurl, fetchpatch, libxml2, findXMLCatalogs }:
+{ stdenv, fetchurl, fetchpatch, libxml2, findXMLCatalogs
+, pythonSupport ? true, python2
+}:
+
+assert pythonSupport -> python2 != null;
+assert pythonSupport -> libxml2.pythonSupport;
 
 stdenv.mkDerivation rec {
   name = "libxslt-1.1.29";
@@ -10,26 +15,33 @@ stdenv.mkDerivation rec {
 
   patches = stdenv.lib.optional stdenv.isSunOS ./patch-ah.patch;
 
-  outputs = [ "bin" "dev" "out" "doc" ];
+  outputs = [ "bin" "dev" "out" "doc" ] ++ stdenv.lib.optional pythonSupport "py";
 
-  buildInputs = [ libxml2 ];
+  buildInputs = [ libxml2.dev ] ++ stdenv.lib.optionals pythonSupport [ libxml2.py python2 ];
 
   propagatedBuildInputs = [ findXMLCatalogs ];
 
   configureFlags = [
-    "--without-python"
     "--without-crypto"
     "--without-debug"
     "--without-mem-debug"
     "--without-debugger"
-  ];
+  ] ++ stdenv.lib.optional pythonSupport "--with-python=${python2}";
 
   postFixup = ''
     moveToOutput bin/xslt-config "$dev"
     moveToOutput lib/xsltConf.sh "$dev"
     moveToOutput share/man/man1 "$bin"
+  '' + stdenv.lib.optionalString pythonSupport ''
+    mkdir -p $py/nix-support
+    echo ${libxml2.py} >> $py/nix-support/propagated-native-build-inputs
+    moveToOutput lib/python2.7 "$py"
   '';
 
+  passthru = {
+    inherit pythonSupport;
+  };
+
   meta = with stdenv.lib; {
     homepage = http://xmlsoft.org/XSLT/;
     description = "A C library and tools to do XSL transformations";
diff --git a/pkgs/top-level/emscripten-packages.nix b/pkgs/top-level/emscripten-packages.nix
index 633b4f8a211..ed9e09802b7 100644
--- a/pkgs/top-level/emscripten-packages.nix
+++ b/pkgs/top-level/emscripten-packages.nix
@@ -10,7 +10,7 @@ with pkgs; rec {
   
   libxml2 = (pkgs.libxml2.override {
     stdenv = emscriptenStdenv;
-    supportPython = false;
+    pythonSupport = false;
   }).overrideDerivation
     (old: { 
       buildInputs = old.buildInputs ++ [ autoreconfHook pkgconfig zlib nodejs ];
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 3d21281c598..071ca6f2bd5 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -13447,6 +13447,12 @@ in {
     clblas = pkgs.clblas-cuda;
   };
 
+  libxml2 = if isPy3k then throw "libxml2 not supported for interpreter ${python.executable}" else
+    (pkgs.libxml2.override{pythonSupport=true; python2=python;}).py;
+
+  libxslt = if isPy3k then throw "libxslt not supported for interpreter ${python.executable}" else
+    (pkgs.libxslt.override{pythonSupport=true; python2=python; inherit (self) libxml2;}).py;
+
   limnoria = buildPythonPackage rec {
     name = "limnoria-${version}";
     version = "2016.05.06";