diff --git a/third_party/lisp/asdf-flv/default.nix b/third_party/lisp/asdf-flv/default.nix
new file mode 100644
index 000000000..3e8843ef4
--- /dev/null
+++ b/third_party/lisp/asdf-flv/default.nix
@@ -0,0 +1,12 @@
+# Imported from https://github.com/didierverna/asdf-flv
+{ pkgs, ... }:
+
+pkgs.nix.buildLisp.library {
+  name = "asdf-flv";
+  deps = with pkgs.third_party.lisp; [ asdf ];
+
+  srcs = [
+    ./package.lisp
+    ./asdf-flv.lisp
+  ];
+}