diff --git a/pkgs/development/python-modules/sh/default.nix b/pkgs/development/python-modules/sh/default.nix
index 37388bf46900..cbfa1583a1d8 100644
--- a/pkgs/development/python-modules/sh/default.nix
+++ b/pkgs/development/python-modules/sh/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchPypi, coverage }:
+{ stdenv, buildPythonPackage, fetchPypi, python, coverage, lsof, glibcLocales }:
 
 buildPythonPackage rec {
   pname = "sh";
@@ -9,10 +9,15 @@ buildPythonPackage rec {
     sha256 = "1z2hx357xp3v4cv44xmqp7lli3frndqpyfmpbxf7n76h7s1zaaxm";
   };
 
-  checkInputs = [ coverage ];
+  postPatch = ''
+    sed -i 's#/usr/bin/env python#${python.interpreter}#' test.py
+  '';
+
+  checkInputs = [ coverage lsof glibcLocales ];
 
   # A test needs the HOME directory to be different from $TMPDIR.
   preCheck = ''
+    export LC_ALL="en_US.UTF-8"
     HOME=$(mktemp -d)
   '';