diff --git a/pkgs/development/interpreters/python/python-2.5b1.nix b/pkgs/development/interpreters/python/python-2.5b1.nix
new file mode 100644
index 000000000000..0f2851831de4
--- /dev/null
+++ b/pkgs/development/interpreters/python/python-2.5b1.nix
@@ -0,0 +1,16 @@
+{stdenv, fetchurl, zlib ? null, zlibSupport ? true}:
+
+assert zlibSupport -> zlib != null;
+
+stdenv.mkDerivation {
+  name = "python-2.5b1";
+  src = fetchurl {
+    url = http://www.python.org/ftp/python/2.5/Python-2.5b1.tgz;
+    md5 = "957c8d24d2ba8d4ba028c7f348ac5c86";
+  };
+  buildInputs = [
+    (if zlibSupport then zlib else null)
+  ];
+  inherit zlibSupport;
+  configureFlags = "--enable-shared";
+}