The [Ruby Devkit](https://github.com/downloads/oneclick/rubyinstaller/DevKit-tdm-32-4.5.2-20111229-1559-sfx.exe) is a 7-zip based self-extracting archive.

I would like to invoke it silently without having to install 7-Zip to extract the files to a folder of my choosing, so that I can script the installation. I imagine it to be something like:

```
cmd> DevKit-tdm-32-4.5.2-20111229-1559-sfx.exe /silent /dir="C:\DevKit"

```

But that, of course, doesn't work. What command line flags must I use to silently extract this archive into a folder of my choice?