diff --git a/dotdrop/installer.py b/dotdrop/installer.py
index 1b41ee4..88daa50 100644
--- a/dotdrop/installer.py
+++ b/dotdrop/installer.py
@@ -118,7 +118,6 @@ class Installer:
         srcs = [os.path.join(parent, child) for child in children]
         dsts = [os.path.join(dst, child) for child in children]
 
-        results = []
         for i in range(len(children)):
             src = srcs[i]
             dst = dsts[i]
@@ -141,9 +140,7 @@ class Installer:
             if len(result):
                 actions = []
 
-            results.append(result)
-
-        return utils.flatten(results)
+        return (src, dst)
 
     def _link(self, src, dst, actions=[]):
         """set src as a link target of dst"""
diff --git a/dotdrop/utils.py b/dotdrop/utils.py
index e08af6e..bf3e979 100644
--- a/dotdrop/utils.py
+++ b/dotdrop/utils.py
@@ -113,11 +113,6 @@ def strip_home(path):
     return path
 
 
-def flatten(a):
-    """flatten list"""
-    return functools.reduce(operator.iconcat, a, [])
-
-
 def must_ignore(paths, ignores, debug=False):
     """return true if any paths in list matches any ignore patterns"""
     if not ignores: