Golang : missing Mercurial command

Problem :

You encounter this funky error message when trying go get some package.

For example :

go: missing Mercurial command. See http://golang.org/s/gogetcmd

package bitbucket.org/kardianos/osext: exec: "hg": executable file not found in $PATH

Solution :

Your local machine does not have Mercurial install. Download and install mercurial from http://mercurial.selenic.com/wiki/Download.

After installing mercurial, rerun the go get command again.