Fix Thrift on Lion

Closes #6575.

1 files changed, 5 insertions, 1 deletions

diff --git a/Library/Formula/thrift.rb b/Library/Formula/thrift.rb
index dafa1830d..40b196dbd 100644
--- a/Library/Formula/thrift.rb
+++ b/Library/Formula/thrift.rb
@@ -9,7 +9,11 @@ class Thrift < Formula
   depends_on 'boost'
 
   def install
-    cp "/usr/X11/share/aclocal/pkg.m4", "aclocal"
+    # No reason for this step is known. On Lion at least the pkg.m4 doesn't
+    # even exist. Turns out that it isn't needed on Lion either. Possibly it
+    # isn't needed anymore at all but I can't test that.
+    cp "/usr/X11/share/aclocal/pkg.m4", "aclocal" if MACOS_VERSION < 10.7
+
     system "./bootstrap.sh" if version == 'HEAD'
 
     # Language bindings try to install outside of Homebrew's prefix, so