diff --git a/buildserver/Vagrantfile b/buildserver/Vagrantfile
index e69dcfeb..6d5e018e 100644
--- a/buildserver/Vagrantfile
+++ b/buildserver/Vagrantfile
@@ -15,8 +15,15 @@ Vagrant.configure("2") do |config|
   config.vm.box = configfile['basebox']
   config.vm.box_url = configfile['baseboxurl']
 
-  # TODO detect if jessie64.box is libvirt, or `vagrant mutate jessie64 libvirt`
-  if `systemd-detect-virt`.include? "qemu" or configfile["vm_provider"] == "libvirt"
+  if not configfile.has_key? "vm_provider" or configfile["vm_provider"] == "virtualbox"
+    # default to VirtualBox if not set
+    config.vm.provider "virtualbox" do |v|
+      v.customize ["modifyvm", :id, "--memory", configfile['memory']]
+      v.customize ["modifyvm", :id, "--cpus", configfile['cpus']]
+      v.customize ["modifyvm", :id, "--hwvirtex", configfile['hwvirtex']]
+    end
+    synced_folder_type = 'virtualbox'
+  elsif configfile["vm_provider"] == "libvirt"
     # use KVM/QEMU if this is running in KVM/QEMU
     config.vm.provider :libvirt do |libvirt|
       libvirt.driver = "kvm"
@@ -27,14 +34,6 @@ Vagrant.configure("2") do |config|
     end
     config.vm.synced_folder './', '/vagrant', type: '9p'
     synced_folder_type = '9p'
-  elsif not configfile.has_key? "vm_provider" or configfile["vm_provider"] == "virtualbox"
-    # default to VirtualBox if not set
-    config.vm.provider "virtualbox" do |v|
-      v.customize ["modifyvm", :id, "--memory", configfile['memory']]
-      v.customize ["modifyvm", :id, "--cpus", configfile['cpus']]
-      v.customize ["modifyvm", :id, "--hwvirtex", configfile['hwvirtex']]
-    end
-    synced_folder_type = 'virtualbox'
   else
     abort("No supported VM Provider found, set vm_provider in Vagrantfile.yaml!")
   end
diff --git a/jenkins-build-makebuildserver b/jenkins-build-makebuildserver
index d77c241c..ed8f0404 100755
--- a/jenkins-build-makebuildserver
+++ b/jenkins-build-makebuildserver
@@ -1,4 +1,3 @@
-
 #!/bin/bash
 
 if [ `dirname $0` != "." ]; then
diff --git a/makebuildserver b/makebuildserver
index 398cd305..eb41a211 100755
--- a/makebuildserver
+++ b/makebuildserver
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import os
+import pathlib
 import requests
 import stat
 import sys
@@ -12,6 +13,11 @@ from clint.textui import progress
 from optparse import OptionParser
 
 
+if not os.path.exists('makebuildserver') and not os.path.exists('buildserver'):
+    print('This must be run as ./makebuildserver in fdroidserver.git!')
+    sys.exit(1)
+
+
 def vagrant(params, cwd=None, printout=False):
     """Run vagrant.
 
@@ -52,9 +58,8 @@ options, args = parser.parse_args()
 cachedir = os.path.join(os.getenv('HOME'), '.cache', 'fdroidserver')
 config = {
     'basebox': 'jessie64',
-    # TODO in py3, convert this to pathlib.Path(absolute_path_string).as_uri()
     'baseboxurl': [
-        'file://' + os.path.join(cachedir, 'jessie64.box'),
+        pathlib.Path(os.path.join(cachedir, 'jessie64.box')).as_uri(),
         'https://f-droid.org/jessie64.box',
     ],
     'debian_mirror': 'http://http.debian.net/debian/',
@@ -87,10 +92,6 @@ elif os.path.exists('makebs.config.py'):
 if '__builtins__' in config:
     del(config['__builtins__'])  # added by compile/exec
 
-if not os.path.exists('makebuildserver') or not os.path.exists(serverdir):
-    print('This must be run from the correct directory!')
-    sys.exit(1)
-
 if os.path.exists(boxfile):
     os.remove(boxfile)