diff --git a/Library/Homebrew/sandbox.rb b/Library/Homebrew/sandbox.rb
index 133bdb83c4b5166df46ac535e9c298503f194087..b1493369a1f0ed645df1a3d3f06fc0b4363fedd0 100644
--- a/Library/Homebrew/sandbox.rb
+++ b/Library/Homebrew/sandbox.rb
@@ -13,6 +13,7 @@ class Sandbox
 
   def self.formula?(formula)
     return false unless available?
+    return false if ARGV.no_sandbox?
     ARGV.sandbox? || SANDBOXED_TAPS.include?(formula.tap.to_s)
   end