Update README.md

Former-commit-id: 774f38f05f53cf0a283135367f35fa63e0defb94

etc/sandstorm/README.md

@@ -5,13 +5,12 @@
 - `cd build`
 - `vagrant-spk setupvm diy`
 - `vagrant-spk vm up`
-- Invoke `../stage.sh` to stage the build files. gfind is gnu find on OS X.
-- Log into the vagrant box `vagrant-spk vm ssh`
+- `cd ..` `./stage.sh` to stage the build files. gfind is gnu find on OS X.
+- Log into the vagrant box `cd build` `vagrant-spk vm ssh`
 - `sudo apt-get update`
 - `sudo apt-get install build-essential`
 - `sudo apt-get install autoconf`
 - `sudo apt-get install libtool-bin`
-- `sudo apt-get install g++`
 - `sudo apt-get install git`
 - [Install latest capnp](https://capnproto.org/install.html)
 - In the build directory `vagrant-spk dev`