treewide: disable tests on darwin

- tthsum
- python-papis
- python-sqlalchemy-migrate
- python-xlib
- dub

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

@@ -5,6 +5,7 @@
 , prompt_toolkit, pygments
 #, optional, dependencies
 , jinja2, whoosh, pytest
+, stdenv
 }:
 
 buildPythonPackage rec {
@@ -28,6 +29,8 @@ buildPythonPackage rec {
     jinja2 whoosh
   ];
 
+  doCheck = !stdenv.isDarwin;
+
   checkInputs = ([
     pytest
   ]) ++ [