1 files changed, 4 insertions, 3 deletions
diff --git a/Library/Formula/cmake.rb b/Library/Formula/cmake.rb
index db19d0b72..3688f8e23 100644
--- a/Library/Formula/cmake.rb
+++ b/Library/Formula/cmake.rb
@@ -1,6 +1,10 @@
 require 'formula'
 
 class NoExpatFramework < Requirement
+  satisfy :build_env => false do
+    not File.exist? "/Library/Frameworks/expat.framework"
+  end
+
   def message; <<-EOS.undent
     Detected /Library/Frameworks/expat.framework
 
@@ -10,9 +14,6 @@ class NoExpatFramework < Requirement
     You may need to move this file out of the way to compile CMake.
     EOS
   end
-  def satisfied?
-    not File.exist? "/Library/Frameworks/expat.framework"
-  end
 end