diff --git a/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2 b/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2
index 3983a744e5..b1c9882871 100644
--- a/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2
+++ b/roles/taskotron/buildmaster-configure/templates/taskotron.master.cfg.j2
@@ -197,7 +197,7 @@ factory.addStep(DirectoryUpload(slavesrc=Interpolate('/var/lib/taskotron/artifac
                                 masterdest=Interpolate('{{ public_artifacts_dir }}/%(prop:uuid)s/task_output')))
 
 {% if deployment_type in ['dev'] %}
-factory.addStep(MasterShellCommand(command=["gzip", Interpolate('{{ public_artifacts_dir }}/%(prop:uuid)s/task_output/*')],
+factory.addStep(MasterShellCommand(command=Interpolate('gzip {{ public_artifacts_dir }}/%(prop:uuid)s/task_output/*'),
                                    descriptionDone=['gzip artifacs dir content']))
 {% endif %}