Something I settled on personally is: You should have a standard build environment in a virtual machine. This comes pretty naturally if you're doing nightly b

Something I settled on personally is: You should have a standard build environment in a virtual machine. This comes pretty naturally if you're doing nightly builds and aggregates 90% of any build.txt into: copy this VM from the DVD to your hard drive and fire it up. Of course, you should maintain a full build.txt anyway. Having a standard build VM which nobody could rebuild from scratch brings its own set of problems.