For building docs, virtualenv is needed.

diff --git a/README.md b/README.md
index eba419fa3143c3df284ebec2b6142d2704869532..630728da4fe41e6d5fb69fe21dbb2f48abe7c985 100644 (file)
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ compiler with C++-2011 support.
 On Debian 8.0, the following is useful:
 
 ```
-$ apt-get install g++ libboost-all-dev libtool make pkg-config libmysqlclient-dev libssl-dev
+$ apt-get install g++ libboost-all-dev libtool make pkg-config libmysqlclient-dev libssl-dev virtualenv
 ```
 
 When building from git, the following packages are also required: autoconf, automake,