diff --git a/Library/Homebrew/extend/ENV.rb b/Library/Homebrew/extend/ENV.rb
index 283e90b696..811737f10e 100644
--- a/Library/Homebrew/extend/ENV.rb
+++ b/Library/Homebrew/extend/ENV.rb
@@ -3,6 +3,12 @@ require "extend/ENV/shared"
 require "extend/ENV/std"
 require "extend/ENV/super"
 
+class Array
+  def to_path_s
+    map(&:to_s).uniq.select { |s| File.directory?(s) }.join(File::PATH_SEPARATOR).chuzzle
+  end
+end
+
 def superenv?
   ARGV.env != "std" && Superenv.bin
 end
diff --git a/Library/Homebrew/extend/ENV/std.rb b/Library/Homebrew/extend/ENV/std.rb
index aafc0a4519..d64f2185a4 100644
--- a/Library/Homebrew/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/ENV/std.rb
@@ -62,7 +62,7 @@ module Stdenv
     paths << "#{HOMEBREW_PREFIX}/share/pkgconfig"
     paths += homebrew_extra_pkg_config_paths
     paths << "/usr/lib/pkgconfig"
-    paths.select { |d| File.directory? d }.join(File::PATH_SEPARATOR)
+    paths.to_path_s
   end
 
   # Removes the MAKEFLAGS environment variable, causing make to use a single job.
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 4d6d96ad3e..166973e092 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -330,10 +330,4 @@ module Superenv
   end
 end
 
-class Array
-  def to_path_s
-    map(&:to_s).uniq.select { |s| File.directory? s }.join(File::PATH_SEPARATOR).chuzzle
-  end
-end
-
 require "extend/os/extend/ENV/super"