diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index e96ac69e9f..657599636c 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -58,14 +58,6 @@ class FormulaInstaller
     return true if f.local_bottle_path
     return false unless f.bottle && f.pour_bottle?
 
-    f.requirements.each do |req|
-      next if req.optional? || req.pour_bottle?
-      if install_bottle_options[:warn]
-        ohai "Building source; bottle blocked by #{req} requirement"
-      end
-      return false
-    end
-
     unless f.bottle.compatible_cellar?
       if install_bottle_options[:warn]
         opoo "Building source; cellar of #{f}'s bottle is #{f.bottle.cellar}"
@@ -265,7 +257,8 @@ class FormulaInstaller
             Requirement.prune
           elsif req.build? && dependent != f && install_bottle_for_dep?(dependent, build)
             Requirement.prune
-          elsif req.satisfied?
+          elsif req.satisfied? && !(pour_bottle? || build_bottle?) \
+                && !(!req.optional? && req.default_formula?)
             Requirement.prune
           elsif req.default_formula?
             dep = req.to_dependency