temp revert back to stump for testing

script/build-vm.sh

@@ -25,7 +25,7 @@ build_nixos_vm () {
 
     mkdir "${build_dir}"
     cd "${build_dir}"
-    nixos-rebuild build-vm
+    doas nixos-rebuild build-vm
 
     echo "[+] Spinning up VM; kill it when you see the line"
     echo "	'Virtualisation disk image created.'"
@@ -55,7 +55,6 @@ build_nixos_vm () {
     doas umount "${mount_point}"
     doas qemu-nbd --disconnect /dev/nbd0
     doas rmdir "${mount_point}"
-    doas rm -r "${build_dir}"
 }
 
 cleanup () {