README updated.

README.md

@@ -27,6 +27,14 @@
 
 ## Build
 
+To compile everything from sources, you'll need some packages installed, namely:
+Berkeley YACC, GNU bison and flex, ELF library and FUSE library.
+Under Ubuntu, for example, you can do it by command:
+
+```shell
+$ sudo apt-get install bison byacc flex libelf-dev libfuse-dev
+```
+
 By default, the system is configured for the Max32 board.
 To select another target board, edit a top-level user-specific Makefile called "Makefile.user"
 and set a TARGET value:
@@ -152,12 +160,3 @@ $ ./pic32
 ```
 
 Configuration of simulated board is stored in file `pic32_max32.conf`.
-
-## Build packages
-
-
-For building under Ubuntu you need the following packages installed:
-
-```shell
-$ sudo apt-get install byacc libelf-dev
-```