diff --git a/Makefile b/Makefile
index a0b7f30..eff9e75 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ SRC = src/lib.rs
 all: $(ISO)
 
 $(ISO): install
-	./tools/create-iso.sh $@ $(INSTALL_ROOT)
+	grub-mkrescue -o $@ $(INSTALL_ROOT)
 
 install: $(KERNEL) $(GRUB_CFG)
 	mkdir -p $(ABS_INSTALL)
diff --git a/tools/create-iso.sh b/tools/create-iso.sh
deleted file mode 100755
index 99131a3..0000000
--- a/tools/create-iso.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-
-iso_filename=$1
-base_dir=$2
-
-unset MFLAGS MAKEFLAGS
-
-grub-mkrescue -o $iso_filename $base_dir