diff --git a/examples/krops/sources.nix b/examples/krops/sources.nix
index 64ae641..2e1ba1f 100644
--- a/examples/krops/sources.nix
+++ b/examples/krops/sources.nix
@@ -18,6 +18,16 @@ krops.lib.evalSource [({
   nixpkgs.file = {
     path = toString <nixpkgs>;
     useChecksum = true;
+    # TODO-EXTERNAL:
+    # Work around symlink sync error on macOS/BSD
+    # (https://github.com/NixOS/nixpkgs/issues/180046)
+    # by excluding the single symlink that's present in nixpkgs.
+    filters = [
+      {
+        type = "exclude";
+        pattern = "/pkgs/development/libraries/readline/update-patch-set.sh";
+      }
+    ];
   };
 
   nix-bitcoin.file = {