diff --git a/pungi/phases/ostree_installer.py b/pungi/phases/ostree_installer.py
index 895827e1..e6f43bbd 100644
--- a/pungi/phases/ostree_installer.py
+++ b/pungi/phases/ostree_installer.py
@@ -127,7 +127,7 @@ class OstreeInstallerThread(WorkerThread):
 
     def _run_ostree_cmd(self, compose, variant, arch, config, source_repo, output_dir, volid):
         lorax_wrapper = lorax.LoraxWrapper()
-        cmd = lorax_wrapper.get_lorax_cmd(
+        lorax_cmd = lorax_wrapper.get_lorax_cmd(
             compose.conf['release_name'],
             compose.conf["release_version"],
             self._get_release(compose, config),
@@ -145,6 +145,8 @@ class OstreeInstallerThread(WorkerThread):
             is_final=compose.supported,
             log_dir=self.logdir,
         )
+        cmd = 'rm -rf %s && %s' % (pipes.quote(output_dir),
+                                   ' '.join([pipes.quote(x) for x in lorax_cmd]))
 
         runroot_channel = compose.conf.get("runroot_channel")
         runroot_tag = compose.conf["runroot_tag"]
diff --git a/tests/test_ostree_installer_phase.py b/tests/test_ostree_installer_phase.py
index b0daeeed..ba56d8c7 100644
--- a/tests/test_ostree_installer_phase.py
+++ b/tests/test_ostree_installer_phase.py
@@ -97,11 +97,12 @@ class OstreeThreadTest(helpers.PungiTestCase):
         if extra:
             lorax_cmd.extend(extra)
 
-        lorax_cmd.append(self.topdir + '/work/x86_64/Everything/ostree_installer')
+        outdir = self.topdir + '/work/x86_64/Everything/ostree_installer'
+        lorax_cmd.append(outdir)
 
         self.assertEqual(koji.get_runroot_cmd.call_args_list,
                          [mock.call('rrt', 'x86_64',
-                                    lorax_cmd,
+                                    'rm -rf %s && %s' % (outdir, ' '.join(lorax_cmd)),
                                     channel=None, mounts=[self.topdir],
                                     packages=['pungi', 'lorax', 'ostree'],
                                     task_id=True, use_shell=True, weight=weight)])