Fix docs

README.md

@@ -28,12 +28,21 @@ Licensed under the GNU Public License v3. See [LICENSE](LICENSE) for details.
 
 To build an ISO image that you can boot, there are several prerequisites:
 
+- `rustup` command installed
 - `limine` command installed
 - `xorriso` command installed
+- `make` command installed
+- `qemu-system-x86_64` command installed (for running)
 
-Then run the [build_iso.sh](build_iso.sh) script. It will generate `gila.iso`.
+Then run `make` to invoke the [Makefile](Makefile).
 
-Running the kernel requires `qemu-system-{ARCH}`.
+- `make prepare`: Installs needed Rust toolchain.
+- `make clean`: Cleans all built files.
+- `make gila`: Builds the kernel ELF file.
+- `make iso`: Builds the bootable ISO with Limine installed.
+- `make run`: Builds the ISO and boots it in QEMU.
+
+TODO: This build setup is not compatible with anything other than `x86_64`.
 
 You can install all these dependencies automatically by using `nix-shell` and
 supplying [shell.nix](shell.nix) as an argument.

shell.nix

@@ -16,6 +16,7 @@ pkgs.mkShell {
     xorriso
     rustup
     qemu
+    make
 
   ];