diff --git a/doc/sphinx_source/conf.py b/doc/sphinx_source/conf.py
index 50c12967f..33b7c0954 100644
--- a/doc/sphinx_source/conf.py
+++ b/doc/sphinx_source/conf.py
@@ -28,7 +28,9 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = []
+#extensions = []
+extensions = ['sphinx_substitution_extensions']
+#extensions = ['sphinx.ext.extlinks']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -256,3 +258,14 @@
 
 # If true, do not generate a @detailmenu in the "Top" node's menu.
 #texinfo_no_detailmenu = False
+
+rst_prolog = """
+.. |eggver| replace:: |version|
+.. |another| replace:: moretext
+"""
+
+
+#rst_epilog = '.. |dlink| replace:: ftp://ftp.eggheads.org/pub/eggdrop/source/1.9/eggdrop-%s.tar.gz' % version
+rst_epilog = """
+.. |dlink| replace:: ftp://ftp.eggheads.org/pub/eggdrop/source/1.9/eggdrop-%s.tar.gz
+""" % (version)