Bottling failed with error on Travis-CI about legacy-linuxbrew HOT 5 CLOSED

diff --git a/Library/Homebrew/keg_fix_install_names.rb b/Library/Homebrew/keg_fix_install_names.rb
index 35d3ddc..01295c6 100644
--- a/Library/Homebrew/keg_fix_install_names.rb
+++ b/Library/Homebrew/keg_fix_install_names.rb
@@ -124,9 +124,13 @@ class Keg < Pathname
   def lib; join 'lib' end

   def each_install_name_for file, &block
-    dylibs = file.dynamically_linked_libraries
-    dylibs.reject! { |fn| fn =~ /^@(loader_|executable_|r)path/ }
-    dylibs.each(&block)
+    if OS.mac?
+      dylibs = file.dynamically_linked_libraries
+      dylibs.reject! { |fn| fn =~ /^@(loader_|executable_|r)path/ }
+      dylibs.each(&block)
+    elsif OS.linux?
+# TODO: implement later.
+    end
   end

   def dylib_id_for file, options={}