diff --git a/pkgs/development/python-modules/shouldbe/default.nix b/pkgs/development/python-modules/shouldbe/default.nix
new file mode 100644
index 000000000000..df868bb4d5e5
--- /dev/null
+++ b/pkgs/development/python-modules/shouldbe/default.nix
@@ -0,0 +1,28 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, nose
+, forbiddenfruit
+}:
+
+buildPythonPackage rec {
+  version = "0.1.0";
+  pname = "shouldbe";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "07pchxpv1xvjbck0xy44k3a1jrvklg0wbyccn14w0i7d135d4174";
+  };
+
+  buildInputs = [ nose ];
+  propagatedBuildInputs = [ forbiddenfruit ];
+
+  doCheck = false;  # Segmentation fault on py 3.5
+
+  meta = with stdenv.lib; {
+    description = "Python Assertion Helpers inspired by Shouldly";
+    homepage =  https://pypi.python.org/pypi/shouldbe/;
+    license = licenses.mit;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e3c11dc0d4f9..8f9f705df276 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3722,27 +3722,7 @@ in {
 
   shortuuid = callPackage ../development/python-modules/shortuuid { };
 
-  shouldbe = buildPythonPackage rec {
-    version = "0.1.0";
-    name = "shouldbe-${version}";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/s/shouldbe/${name}.tar.gz";
-      sha256 = "07pchxpv1xvjbck0xy44k3a1jrvklg0wbyccn14w0i7d135d4174";
-    };
-
-    buildInputs = with self; [ nose ];
-
-    propagatedBuildInputs = with self; [ forbiddenfruit ];
-
-    doCheck = false;  # Segmentation fault on py 3.5
-
-    meta = {
-      description = "Python Assertion Helpers inspired by Shouldly";
-      homepage =  https://pypi.python.org/pypi/shouldbe/;
-      license = licenses.mit;
-    };
-  };
+  shouldbe = callPackage ../development/python-modules/shouldbe { };
 
   simplejson = callPackage ../development/python-modules/simplejson { };