diff --git a/Library/Homebrew/cmd/install.rb b/Library/Homebrew/cmd/install.rb
index 5aa198f316..4a20dc7cb5 100644
--- a/Library/Homebrew/cmd/install.rb
+++ b/Library/Homebrew/cmd/install.rb
@@ -12,7 +12,7 @@ module Homebrew extend self
     end unless ARGV.force?
 
     ARGV.formulae.each do |f|
-      if File.directory? HOMEBREW_REPOSITORY/"Library/LinkedKegs/#{f.name}"
+      if f.linked_keg.directory?
         raise "#{f} already installed\nTry: brew upgrade #{f}"
       end
     end unless ARGV.force?
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 28592eb725..512dafaf04 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -69,8 +69,7 @@ class Formula
   end
 
   def linked_keg
-    keg = Pathname.new(HOMEBREW_REPOSITORY/"Library/LinkedKegs"/@name)
-    if keg.exist? then Keg.new(keg.realpath) else nil end
+    HOMEBREW_REPOSITORY/'Library/LinkedKegs'/@name
   end
 
   def installed_prefix
diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 9e52b9e3b7..469db2db3c 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -66,7 +66,7 @@ class FormulaInstaller
     fi.show_header = false
     oh1 "Installing #{f} dependency: #{dep}"
     fi.install
-    dep.linked_keg.unlink if dep.linked_keg
+    Keg.new(dep.linked_keg.realpath).unlink if dep.linked_keg.directory?
     fi.caveats
     fi.finish
   end
diff --git a/Library/Homebrew/tab.rb b/Library/Homebrew/tab.rb
index cf457f6743..c22998dc3e 100644
--- a/Library/Homebrew/tab.rb
+++ b/Library/Homebrew/tab.rb
@@ -46,7 +46,7 @@ class Tab < OpenStruct
 
   def self.for_formula f
     f = Formula.factory f unless f.kind_of? Formula
-    path = HOMEBREW_REPOSITORY + 'Library' + 'LinkedKegs' + f.name + 'INSTALL_RECEIPT.json'
+    path = f.linked_keg/'INSTALL_RECEIPT.json'
 
     if path.exist?
       self.from_file path