diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
index ecab0941332..108b430d783 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
@@ -34,7 +34,9 @@ appleDerivation rec {
                  "system_platform"
                  "system_pthread"
                  "system_sandbox"
-                 "system_stats"
+                 # does not exist in El Capitan beta
+                 # FIXME: does anything on yosemite actually need this?
+                 # "system_stats"
                  "unc"
                  "unwind"
                  "xpc"