diff --git a/README.md b/README.md
index 6bc4e8e4..375add1f 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ Each major component and library has its own subdirectory (kernel, userspace, li
 ### Needed packages
 
 #### apt (tested on ubuntu 22.04)
-```# apt install build-essential git ninja-build texinfo bison flex libgmp-dev libmpfr-dev libmpc-dev parted qemu-system-x86```
+```# apt install build-essential git ninja-build texinfo bison flex libgmp-dev libmpfr-dev libmpc-dev parted qemu-system-x86 cpu-checker```
 
 #### pacman
 ```# pacman -S --needed base-devel git wget cmake ninja parted qemu-system-x86```
diff --git a/script/build.sh b/script/build.sh
index eb0c2ad2..23144d28 100755
--- a/script/build.sh
+++ b/script/build.sh
@@ -60,7 +60,11 @@ run_bochs () {
 	$BANAN_SCRIPT_DIR/bochs.sh $@
 }
 
-if [[ -c /dev/kvm ]]; then
+if type kvm-ok &> /dev/null; then
+	if kvm-ok &> /dev/null; then
+		QEMU_ACCEL="-accel kvm"
+	fi
+elif [[ -c /dev/kvm ]]; then
 	if [[ -r /dev/kvm ]] && [[ -w /dev/kvm ]]; then
 		QEMU_ACCEL="-accel kvm"
 	else