Added detail about get-peasoup-packages

README.md

@@ -10,7 +10,6 @@ The instructions that follow assume that:
 
 First install the Zipr static binary rewriting infrastructure
 ```
-cd ~
 git clone --recurse-submodules  https://git.zephyr-software.com/allnp/zafl_umbrella.git # or git@git.zephyr-software.com:opensrc/peasoup_umbrella.git
 cd peasoup_umbrella
 . set_env_vars
@@ -18,6 +17,11 @@ cd peasoup_umbrella
 scons -j3
 ```
 
+Carefully watch the `get-peasoup-packages` command for errors.  
+It leverages' Ubuntu's `apt` or CentOS' `yum` commands to install packages.
+All packages should be in standard repositiories, but your local configuration may
+need to be adjusted if it doesn't work by default.
+
 # Preparing Zipr for Use (Setting up local postgres tables)
 
 Next we need to setup the proper tables in a local copy of the postgres database.