diff --git a/pmb/config/__init__.py b/pmb/config/__init__.py
index a999f781..62499edc 100644
--- a/pmb/config/__init__.py
+++ b/pmb/config/__init__.py
@@ -46,7 +46,7 @@ pmaports_min_version = "7"
 # Version of the work folder (as asked during 'pmbootstrap init'). Increase
 # this number, whenever migration is required and provide the migration code,
 # see migrate_work_folder()).
-work_version = 6
+work_version = 7
 
 # Minimum required version of postmarketos-ondev (pmbootstrap install --ondev).
 # Try to support the current versions of all channels (edge, v21.03). When
diff --git a/pmb/helpers/other.py b/pmb/helpers/other.py
index acb76397..a4642fa5 100644
--- a/pmb/helpers/other.py
+++ b/pmb/helpers/other.py
@@ -238,6 +238,22 @@ def migrate_work_folder():
         migrate_success(context.config.work, 6)
         current = 6
 
+    if current == 6:
+        # Ask for confirmation
+        logging.info("Changelog:")
+        logging.info("* Major refactor for pmb 3.0.0")
+        logging.info("Migration will do the following:")
+        logging.info("* Zap your chroots")
+        if not pmb.helpers.cli.confirm():
+            raise RuntimeError("Aborted.")
+
+        # Zap chroots
+        pmb.chroot.zap(False)
+
+        # Update version file
+        migrate_success(context.config.work, 7)
+        current = 7
+
     # Can't migrate, user must delete it
     if current != required:
         raise RuntimeError(