diff --git a/pkgs/development/python-modules/http_signature/default.nix b/pkgs/development/python-modules/http_signature/default.nix
new file mode 100644
index 00000000000..48f06db1ba5
--- /dev/null
+++ b/pkgs/development/python-modules/http_signature/default.nix
@@ -0,0 +1,26 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, pycrypto
+}:
+
+buildPythonPackage rec {
+  pname = "http_signature";
+  version = "0.1.4";
+  disabled = isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "14acc192ef20459d5e11b4e800dd3a4542f6bd2ab191bf5717c696bf30936c62";
+  };
+
+  propagatedBuildInputs = [ pycrypto ];
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/atl/py-http-signature;
+    description = "Simple secure signing for HTTP requests using http-signature";
+    license = licenses.mit;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index bf5d9b789b5..d2e6b9676fd 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2452,23 +2452,7 @@ in {
 
   html5lib = callPackage ../development/python-modules/html5lib { };
 
-  http_signature = buildPythonPackage (rec {
-    name = "http_signature-0.1.4";
-    disabled = isPy3k;
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/h/http_signature/${name}.tar.gz";
-      sha256 = "14acc192ef20459d5e11b4e800dd3a4542f6bd2ab191bf5717c696bf30936c62";
-    };
-
-    propagatedBuildInputs = with self; [pycrypto];
-
-    meta = {
-      homepage = https://github.com/atl/py-http-signature;
-      description = "";
-      license = licenses.mit;
-    };
-  });
+  http_signature = callPackage ../development/python-modules/http_signature { };
 
   httpbin = callPackage ../development/python-modules/httpbin { };