diff --git a/packages/expect.rb b/packages/expect.rb
index a29f30b98ebb1240cad66d8c1d73ad053a1dd896..fa5e3055032a3638bdfc3608b08a7b031d7db85d 100644
--- a/packages/expect.rb
+++ b/packages/expect.rb
@@ -10,7 +10,7 @@ class Expect < Package
   depends_on "tcl"
 
   def self.build
-    system "./configure", "--prefix=/usr/local"
+    system "./configure", "--prefix=#{CREW_PREFIX}", "--libdir=#{CREW_LIB_PREFIX}"
     system "make"
   end