add apt/system package install instructions

next/README.md

@@ -10,7 +10,13 @@ Make sure you cd to the `next` directory.
 cd next
 ```
 
-To install required libbpf dependencies, run:
+To install the system packages (on Ubuntu 24.04) for compiling the binary, run:
+
+```
+sudo apt install clang llvm libbfd-dev
+```
+
+To install required libbpf dependencies for the GitHub repo, run:
 
 ```
 git submodule update --init --recursive