diff --git a/design/tpl/.gitignore b/design/tpl/.gitignore
index 7131a70e..40f3ab0e 100644
--- a/design/tpl/.gitignore
+++ b/design/tpl/.gitignore
@@ -18,3 +18,11 @@
 
 # latexmk
 *.fdb_latexmk
+
+# configure
+conf.tex
+aclocal.m4
+autom4te.cache
+config.status
+configure
+
diff --git a/design/tpl/autogen.sh b/design/tpl/autogen.sh
new file mode 100755
index 00000000..a42088b1
--- /dev/null
+++ b/design/tpl/autogen.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+# Autoreconf runner
+
+which autoreconf &>/dev/null || {
+  echo "\`autoreconf' not found in PATH"
+  exit 1
+}
+
+exec autoreconf -fvi
+
diff --git a/design/tpl/conf.tex.in b/design/tpl/conf.tex.in
new file mode 100644
index 00000000..02d757b0
--- /dev/null
+++ b/design/tpl/conf.tex.in
@@ -0,0 +1,5 @@
+% TAME Programming Language configuration
+%
+% @AUTOGENERATED@
+
+\tplappendix@ENABLE_APPENDIX@
diff --git a/design/tpl/configure.ac b/design/tpl/configure.ac
new file mode 100644
index 00000000..9334c329
--- /dev/null
+++ b/design/tpl/configure.ac
@@ -0,0 +1,38 @@
+# Autoconf configuration
+#
+#  Copyright (C) 2021 Ryan Specialty Group, LLC
+#
+#  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
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program 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/>.
+##
+
+AC_INIT([tpl], [0.0.0], [])
+
+# TODO: Check for pdflatex and required packages
+
+use_appendix=false
+AC_ARG_ENABLE(
+  [appendix],
+  [AS_HELP_STRING([--enable-appendix],
+                  [enable appendix (default no)])],
+  [test "x$enableval" == xyes && use_appendix=true])
+
+AC_SUBST([ENABLE_APPENDIX], [$use_appendix])
+
+AC_SUBST([AUTOGENERATED],
+         ["THIS FILE IS AUTOGENERATED!  DO NOT MODIFY!  See *.in."])
+
+# generate files from their *.in counterparts
+AC_CONFIG_FILES([conf.tex])
+AC_OUTPUT
+
diff --git a/design/tpl/tpl.sty b/design/tpl/tpl.sty
index 8781ac6a..2404bcbb 100644
--- a/design/tpl/tpl.sty
+++ b/design/tpl/tpl.sty
@@ -172,3 +172,15 @@
   \hfill\textdbend\textbf{\textsl{#1}}\textdbend\hfill
   \bigskip
 }
+
+
+%
+% Dynamic Configuration
+%
+\newif\iftplappendix
+
+\InputIfFileExists{./conf.tex}%
+  {\message{Loaded `./conf.tex'.}}%
+  {\message{`./conf.tex' not found (did you run `./configure'?).
+            Using defaults.}%
+}
\ No newline at end of file
diff --git a/design/tpl/tpl.tex b/design/tpl/tpl.tex
index c1b02f7d..df7a6d8c 100644
--- a/design/tpl/tpl.tex
+++ b/design/tpl/tpl.tex
@@ -56,13 +56,12 @@
 \input{sec/notation.tex}
 \input{sec/class.tex}
 
-% Flag is on for now
-\let\WITHAPPENDIX1
 
-\ifx\WITHAPPENDIX1
-\clearpage
-\appendix
-\input{sec/appendix-typesetting.tex}
+% Appendix may be enabled with `./configure --enable-appendix'.
+\iftplappendix
+ \clearpage
+ \appendix
+ \input{sec/appendix-typesetting.tex}
 \fi
 
 % Ensure Copyright line does not show for Index