Build doc updates

1 files changed, 31 insertions, 0 deletions

diff --git a/contrib/gitian-descriptors/README b/contrib/gitian-descriptors/README
index 8a304eb349..8f272b0097 100644
--- a/contrib/gitian-descriptors/README
+++ b/contrib/gitian-descriptors/README
@@ -53,3 +53,34 @@ Once you've got the right hardware and software:
 
     # Build Win32 release:
     ./bin/gbuild --commit bitcoin=HEAD ../bitcoin/contrib/gitian-descriptors/gitian-win32.yml
+
+---------------------
+
+gitian-builder now also supports building using LXC. See
+  https://help.ubuntu.com/12.04/serverguide/lxc.html
+... for how to get LXC up and running under Ubuntu.
+
+If your main machine is a 64-bit Mac or PC with a few gigabytes of memory
+and at least 10 gigabytes of free disk space, you can gitian-build using
+LXC running inside a virtual machine.
+
+Here's a description of Gavin's setup on OSX 10.6:
+
+1. Download and install VirtualBox from https://www.virtualbox.org/
+
+2. Download the 64-bit Ubuntu Desktop 12.04 LTS .iso CD image from
+  http://www.ubuntu.com/
+
+3. Run VirtualBox and create a new virtual machine, using the
+  Ubuntu .iso (see the VirtualBox documentation for details).
+  Create it with at least 2 gigabytes of memory and a disk
+  that is at least 20 gigabytes big.
+
+4. Inside the running Ubuntu desktop, install:
+  sudo apt-get install debootstrap lxc ruby apache2 git apt-cacher-ng python-vm-builder
+
+5. Still inside Ubuntu, tell gitian-builder to use LXC, then follow the "Once you've got the right
+  hardware and software" instructions above:
+  export USE_LXC=1
+  git clone git://github.com/bitcoin/bitcoin.git
+  ... etc