diff --git BUILD.boost BUILD.boost
--- BUILD.boost
+++ BUILD.boost
@@ -313,1 +313,9 @@ boost_library(name = "asio",
-    linkopts = ["-lpthread"],
+    linkopts = select({
+        ":linux": [
+            "-lpthread",
+        ],
+        ":osx_x86_64": [
+            "-lpthread",
+        ],
+        "//conditions:default": [],
+    }),
--