diff --git a/haskell-commands.el b/haskell-commands.el
index ab845d553..44a9eccd8 100644
--- a/haskell-commands.el
+++ b/haskell-commands.el
@@ -33,6 +33,7 @@
 (require 'haskell-presentation-mode)
 (require 'haskell-utils)
 (require 'highlight-uses-mode)
+(require 'haskell-customize)
 
 ;;;###autoload
 (defun haskell-process-restart ()
@@ -702,11 +703,11 @@ function `xref-find-definitions' after new table was generated."
                             (haskell-session-cabal-dir (haskell-process-session (car state)))))
               (haskell-process-send-string
                (car state)
-               (format ":!cd %s && %s | %s"
+               (format ":!cd %s && %s"
                        (haskell-session-cabal-dir
                         (haskell-process-session (car state)))
-                       "find . -type f \\( -name '*.hs' -or -name '*.lhs' -or -name '*.hsc' \\) -not \\( -name '#*' -or -name '.*' \\) -print0"
-                       "xargs -0 hasktags -e -x"))))
+                       haskell-tags-command
+                       ))))
       :complete (lambda (state _response)
                   (when (cdr state)
                     (let ((session-tags
diff --git a/haskell-customize.el b/haskell-customize.el
index 6bfd67b66..658b7a3e3 100644
--- a/haskell-customize.el
+++ b/haskell-customize.el
@@ -404,6 +404,13 @@ same vein as `haskell-indent-spaces'."
   :group 'haskell
   :type '(repeat 'string))
 
+;;;###autoload
+(defcustom haskell-tags-command
+  "find . -type f \\( -name '*.hs' -or -name '*.lhs' -or -name '*.hsc' \\) -not \\( -name '#*' -or -name '.*' \\) -print0 | xargs -0 hasktags -e -x"
+  "Command to run from the project root to find haskell files and generate a TAGS file"
+  :type 'string
+  :group 'haskell)
+
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Accessor functions