pystringtemplate -> pythonPackages.pystringtemplate

and use buildPythonPackage

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

@@ -1,6 +1,6 @@
-{stdenv, fetchurl, python, antlr}:
+{stdenv, fetchurl, buildPythonPackage, antlr, isPy3k}:
 
-stdenv.mkDerivation rec {
+buildPythonPackage rec {
   name = "PyStringTemplate-${version}";
   version = "3.2b1";
 
@@ -9,13 +9,12 @@ stdenv.mkDerivation rec {
     sha256 = "0lbib0l8c1q7i1j610rwcdagymr1idahrql4dkgnm5rzyg2vk3ml";
   };
 
-  propagatedBuildInputs = [python antlr];
+  propagatedBuildInputs = [ antlr ];
 
-  dontBuild = true;
+  disabled = isPy3k;
 
-  installPhase = ''
-    python setup.py install --prefix=$out --install-lib=$(toPythonPath $out) -O1
-  '';
+  # No tests included in archive
+  doCheck = false;
 
   meta = {
     homepage = "http://www.stringtemplate.org/";