diff --git a/doc/sphinx/conf.py b/doc/sphinx/conf.py
index 5688a5d52..e48870d64 100644
--- a/doc/sphinx/conf.py
+++ b/doc/sphinx/conf.py
@@ -13,6 +13,8 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 #
 import os
+import lsb_release
+
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
 
@@ -24,9 +26,11 @@
 author = 'SiFive Inc.'
 
 # The short X.Y version
-version = os.environ['RELEASE_TAG']
+distro_info = lsb_release.get_distro_information()
+
 # The full version, including alpha/beta/rc tags
-release = version
+release = distro_info['RELEASE']
+
 
 
 # -- General configuration ---------------------------------------------------