diff --git a/pkgs/development/python-modules/sure/default.nix b/pkgs/development/python-modules/sure/default.nix
new file mode 100644
index 000000000000..31ec9c12b002
--- /dev/null
+++ b/pkgs/development/python-modules/sure/default.nix
@@ -0,0 +1,32 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, nose
+, six
+, mock
+, pkgs
+, isPyPy
+}:
+
+buildPythonPackage rec {
+  pname = "sure";
+  version = "1.2.24";
+  disabled = isPyPy;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1lyjq0rvkbv585dppjdq90lbkm6gyvag3wgrggjzyh7cpyh5c12w";
+  };
+
+  LC_ALL="en_US.UTF-8";
+
+  buildInputs = [ nose pkgs.glibcLocales ];
+  propagatedBuildInputs = [ six mock ];
+
+  meta = with stdenv.lib; {
+    description = "Utility belt for automated testing";
+    homepage = https://falcao.it/sure/;
+    license = licenses.gpl3Plus;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 2e4bee579b53..313aa0d50ad4 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3920,29 +3920,7 @@ in {
 
   subunit = callPackage ../development/python-modules/subunit { };
 
-  sure = buildPythonPackage rec {
-    name = "sure-${version}";
-    version = "1.2.24";
-
-    LC_ALL="en_US.UTF-8";
-
-    disabled = isPyPy;
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/s/sure/${name}.tar.gz";
-      sha256 = "1lyjq0rvkbv585dppjdq90lbkm6gyvag3wgrggjzyh7cpyh5c12w";
-    };
-
-    buildInputs = with self; [ nose pkgs.glibcLocales ];
-
-    propagatedBuildInputs = with self; [ six mock ];
-
-    meta = {
-      description = "Utility belt for automated testing";
-      homepage = https://falcao.it/sure/;
-      license = licenses.gpl3Plus;
-    };
-  };
+  sure = callPackage ../development/python-modules/sure { };
 
   structlog = callPackage ../development/python-modules/structlog { };