diff --git a/.build/iso/boot/grub/grub.cfg b/.build/iso/boot/grub/grub.cfg
deleted file mode 100644
index 08a2ab9..0000000
--- a/.build/iso/boot/grub/grub.cfg
+++ /dev/null
@@ -1,4 +0,0 @@
-menuentry "nub-os" {
-    multiboot /boot/kernel.bin
-    boot
-}
diff --git a/.gitignore b/.gitignore
index 4cf3c42..b7f1399 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1 @@
-*.bin
-*.o
-*.iso
\ No newline at end of file
+.build
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0d9accc
--- /dev/null
+++ b/README.md
@@ -0,0 +1,18 @@
+# Nub OS
+
+## Dependencies
+
+- `make`
+- `grub`
+- `mtools`
+- `i386-elf-gcc`
+- `i386-elf-ld`
+
+## Building
+
+```sh
+# Create iso
+make iso
+# Run virtual machine with your iso
+qemu-system-x86_64 -cdrom .build/nub-os.iso
+```
diff --git a/makefile b/makefile
index 7a8c7bb..be17e9c 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,8 @@
+BUILDDIR=mkdir-build
 CC = i386-elf-gcc -ffreestanding -m32
 
+iso: .build/ .build/nub-os.iso
+
 .build/nub-os.iso: .build/kernel.bin
 	mkdir -p .build/iso/boot/grub
 	cp grub.cfg .build/iso/boot/grub
@@ -24,5 +27,8 @@ CC = i386-elf-gcc -ffreestanding -m32
 run: .build/nub-os.iso
 	qemu-system-x86_64 -cdrom .build/nub-os.iso
 
+.build/:
+	mkdir .build
+
 clean:
-	@rm -r .build/* 2>/dev/null || true
+	@rm -r .build 2>/dev/null || true