diff --git a/src/steps/init_os.rs b/src/steps/init_os.rs
index 788e6a8..8c42c66 100644
--- a/src/steps/init_os.rs
+++ b/src/steps/init_os.rs
@@ -79,6 +79,12 @@ initramfs initramfs-rpi4
 
 	// bootstrap alpine
 	run(&[
+		"docker",
+		"run",
+		"--rm",
+		"-v",
+		&format!("{root}:{root}", root = &*img.root),
+		"alpine",
 		"apk",
 		"add",
 		"--root",
diff --git a/src/steps/prepare_img.rs b/src/steps/prepare_img.rs
index 87342ab..07f5277 100644
--- a/src/steps/prepare_img.rs
+++ b/src/steps/prepare_img.rs
@@ -22,7 +22,7 @@ pub fn prepare_img() -> anyhow::Result<Image> {
 	run_parted!(path, "mkpart", "primary", "ext4", "128M", &size)?;
 
 	// create a loopback device
-	let output = run_output(&["losetup", "-f", "--show", path.to_str().unwrap()])?;
+	let output = run_output(&["losetup", "-P", "-f", "--show", path.to_str().unwrap()])?;
 	print!("{output}");
 	let idx = output.find("/dev/loop").ok_or_else(|| anyhow!("Unable to identify loop device"))?;
 	let mut end = idx + "/dev/loop".len();