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diff --git a/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-sandbox.el b/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-sandbox.el
new file mode 100644
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+++ b/configs/shared/emacs/.emacs.d/elpa/haskell-mode-20180913.348/haskell-sandbox.el
@@ -0,0 +1,41 @@
+;;; haskell-sandbox.el --- Support for sandboxes -*- lexical-binding: t -*-
+
+;; Copyright (c) 2014 Chris Done. All rights reserved.
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'haskell-session)
+
+(defun haskell-sandbox-path (session)
+  "If there is a haskell-session, return the path to the usual sandbox location."
+  (concat (haskell-session-cabal-dir session)
+          "/.cabal-sandbox"))
+
+(defun haskell-sandbox-exists-p (session)
+  "Is there a cabal sandbox?"
+  (file-exists-p (haskell-sandbox-path session)))
+
+(defun haskell-sandbox-pkgdb (session)
+  "Get the package database of the sandbox."
+  (let* ((files (directory-files (haskell-sandbox-path session)))
+         (dir (car (cl-remove-if-not (lambda (file)
+                                        (string-match ".conf.d$" file))
+                                      files))))
+    (when dir
+      (concat (haskell-sandbox-path session) "/" dir))))
+
+(provide 'haskell-sandbox)