mitchellh/packer — pull request #86 by markjaquith (2013-07-01 02:48:17+00:00)
Title: Note that Mercurial (hg) is a dependency for developing on Packer

If you don't have Mercurial, you get:

> go: missing Mercurial command. See http://golang.org/s/gogetcmd
> package code.google.com/p/go.crypto/ssh: exec: "hg": executable file not found in $PATH

when building Packer.