diff --git a/zorg/buildbot/builders/ClangBuilder.py b/zorg/buildbot/builders/ClangBuilder.py
--- a/zorg/buildbot/builders/ClangBuilder.py
+++ b/zorg/buildbot/builders/ClangBuilder.py
@@ -532,7 +532,7 @@
                                workdir='test',
                                env=env))
         f.addStep(ShellCommand(name='recreate sandbox',
-                               command=['virtualenv', 'sandbox'],
+                               command=['virtualenv', '--python=python3', 'sandbox'],
                                haltOnFailure=True,
                                description='recreating sandbox',
                                workdir='test',