diff --git a/11.nix b/11.nix
new file mode 100644
index 0000000..1f734b9
--- /dev/null
+++ b/11.nix
@@ -0,0 +1,8 @@
+let
+  func = {a, b, ...}@bargs: if a == "foo" then
+    b + bargs.c else b + bargs.x + bargs.y;
+in
+{
+  #complete next line so it evaluates to "foobar"
+  foobar = func {a="bar"; b="foo"; x="bar"; y="";}; #ONLY EDIT THIS LINE
+}
\ No newline at end of file