As a Binary
Grab the latest version from here:
expand it, and
cd into the resulting directory. Then run:
and that should also do it.
Download the source code repo and install the dependencies:
go get -u github.com/wtfutil/wtf cd $GOPATH/src/github.com/wtfutil/wtf go install -ldflags="-s -w" make run
and that should do it.