diff --git a/dvc/config.py b/dvc/config.py
index 8ed0e56fe0..e969c104b8 100644
--- a/dvc/config.py
+++ b/dvc/config.py
@@ -314,10 +314,9 @@ def load(self, validate=True):
 
     def _load_config(self, level):
         filename = self.files[level]
-        tree = self.tree if level == "repo" else self.wtree
 
-        if tree.exists(filename, use_dvcignore=False):
-            with tree.open(filename) as fobj:
+        if self.tree.exists(filename, use_dvcignore=False):
+            with self.tree.open(filename) as fobj:
                 conf_obj = configobj.ConfigObj(fobj)
         else:
             conf_obj = configobj.ConfigObj()
@@ -325,14 +324,13 @@ def _load_config(self, level):
 
     def _save_config(self, level, conf_dict):
         filename = self.files[level]
-        tree = self.tree if level == "repo" else self.wtree
 
         logger.debug(f"Writing '{filename}'.")
 
-        tree.makedirs(os.path.dirname(filename))
+        self.tree.makedirs(os.path.dirname(filename))
 
         config = configobj.ConfigObj(_pack_remotes(conf_dict))
-        with tree.open(filename, "wb") as fobj:
+        with self.tree.open(filename, "wb") as fobj:
             config.write(fobj)
         config.filename = filename
 
diff --git a/dvc/utils/build.py b/dvc/utils/build.py
new file mode 100644
index 0000000000..ba89177005
--- /dev/null
+++ b/dvc/utils/build.py
@@ -0,0 +1 @@
+PKG = "deb"