The Debian packaging of emacs-noflet is maintained in git, using the
merging workflow described in dgit-maint-merge(7).  There isn't a
patch queue that can be represented as a quilt series.

A detailed breakdown of the changes is available from their canonical
representation - git commits in the packaging repository.  For
example, to see the changes made by the Debian maintainer in the first
upload of upstream version 1.2.3, you could use:

    % git clone https://git.dgit.debian.org/emacs-noflet
    % cd emacs-noflet
    % git log --oneline 1.2.3..debian/1.2.3-1 -- . ':!debian'

(If you have dgit, use `dgit clone emacs-noflet`, rather than plain
`git clone`.)

A single combined diff, containing all the changes, follows.
--- /dev/null
+++ emacs-noflet-0.0.15/.gitignore
@@ -0,0 +1 @@
+debian/elpa-noflet
--- emacs-noflet-0.0.15.orig/noflet.el
+++ emacs-noflet-0.0.15/noflet.el
@@ -6,6 +6,7 @@
 ;; Keywords: lisp
 ;; Version: 0.0.15
 ;; Url: https://github.com/nicferrier/emacs-noflet
+;; Package-Requires: ((cl-lib "0.4") (dash "2.10.0"))
 
 ;; This program is free software; you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
@@ -28,7 +29,8 @@
 
 ;;; Code:
 
-(eval-when-compile (require 'cl))
+(require 'dash)
+(eval-when-compile (require 'cl-lib))
 (if (version< emacs-version "24.4.1")
     (load-library "cl-indent")
     (require 'cl-indent))
@@ -155,7 +157,7 @@ maintainers refuse to add the correct in
            (indent noflet-indent-func))
   `(cl-flet ,bindings ,@body))
 
-(defmacro* letn (tag bindings &rest body)
+(cl-defmacro letn (tag bindings &rest body)
   (declare (debug (sexp sexp &rest form))
            (indent 2))
   `(cl-labels ((,tag ,(-map 'car bindings) ,@body))
