diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index 1b0bf8b27b..eed5d03834 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -356,7 +356,7 @@ class Pathname
 
   # Writes an exec script in this folder for each target pathname
   def write_exec_script *targets
-    targets = [targets].flatten
+    targets.flatten!
     if targets.empty?
       opoo "tried to write exec sripts to #{self} for an empty list of targets"
     end
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 6026f5b6ea..b7739a74ad 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -781,7 +781,7 @@ class Formula
     end
 
     def skip_clean *paths
-      paths = [paths].flatten
+      paths.flatten!
 
       # :all is deprecated though
       if paths.include? :all