Clarify that build instructions here are just for Stratux base images.

How-to-compile-and-build-Stratux-executable.md

@@ -4,6 +4,8 @@ The faster speed of the Raspberry Pi 3 compiles the code about 3x faster than a
 
 Command line can be accessed either directly on the Pi itself (plug in HDMI monitor and USB keyboard) or remotely using a terminal window (Mac Utilities Terminal or Windows PC using PuTTY). The remote computer can be connected over Wi-Fi or Wired Ethernet using SSH.
 
+The standard Stratux image has all of the dependencies installed except for those installed below. If you are using a clean Raspbian install or another distribution, you will need to dig through the `image/` directory in the source and manually determine what your system needs.
+
 From a remote computer (can be over Wi-Fi or wired Ethernet), login using SSH by opening a Terminal window in Mac or using PuTTY in Windows
 
     ssh pi@192.168.1.76