diff --git a/pkgs/development/python-modules/fs/default.nix b/pkgs/development/python-modules/fs/default.nix
index 5e90d29cc5a..1ab01cf7d89 100644
--- a/pkgs/development/python-modules/fs/default.nix
+++ b/pkgs/development/python-modules/fs/default.nix
@@ -1,4 +1,5 @@
-{ pkgs
+{ lib
+, glibcLocales
 , buildPythonPackage
 , fetchPypi
 , six
@@ -25,24 +26,21 @@ buildPythonPackage rec {
     sha256 = "87e8d4e93040779a407c92b7f2f27117038927b4b1da41bdce23ce226557327d";
   };
 
-  buildInputs = [ pkgs.glibcLocales ];
+  buildInputs = [ glibcLocales ];
   checkInputs = [ nose pyftpdlib mock psutil ];
   propagatedBuildInputs = [ six appdirs pytz ]
-    ++ pkgs.lib.optionals (!isPy3k) [ backports_os ]
-    ++ pkgs.lib.optionals (!pythonAtLeast "3.6") [ typing ]
-    ++ pkgs.lib.optionals (!pythonAtLeast "3.5") [ scandir ]
-    ++ pkgs.lib.optionals (!pythonAtLeast "3.5") [ enum34 ];
-
-  postPatch = ''
-    # required for installation
-    touch LICENSE
-    # tests modify home directory results in (4 tests failing) / 1600
-    rm tests/test_appfs.py tests/test_opener.py
-  '';
+    ++ lib.optionals (!isPy3k) [ backports_os ]
+    ++ lib.optionals (!pythonAtLeast "3.6") [ typing ]
+    ++ lib.optionals (!pythonAtLeast "3.5") [ scandir ]
+    ++ lib.optionals (!pythonAtLeast "3.5") [ enum34 ];
 
   LC_ALL="en_US.utf-8";
 
-  meta = with pkgs.lib; {
+  checkPhase = ''
+    HOME=$(mktemp -d) nosetests tests []
+  '';
+
+  meta = with lib; {
     description = "Filesystem abstraction";
     homepage    = https://github.com/PyFilesystem/pyfilesystem2;
     license     = licenses.bsd3;