diff --git a/third_party/lisp/fiveam/default.nix b/third_party/lisp/fiveam/default.nix
new file mode 100644
index 000000000..07b4cc0ee
--- /dev/null
+++ b/third_party/lisp/fiveam/default.nix
@@ -0,0 +1,28 @@
+# FiveAM is a Common Lisp testing framework.
+#
+# Imported from https://github.com/sionescu/fiveam.git
+
+{ pkgs, ... }:
+
+pkgs.nix.buildLisp.library {
+  name = "fiveam";
+
+  deps = with pkgs.third_party.lisp; [
+    alexandria
+    asdf-flv
+    trivial-backtrace
+  ];
+
+  srcs = [
+    ./src/package.lisp
+    ./src/utils.lisp
+    ./src/check.lisp
+    ./src/fixture.lisp
+    ./src/classes.lisp
+    ./src/random.lisp
+    ./src/test.lisp
+    ./src/explain.lisp
+    ./src/suite.lisp
+    ./src/run.lisp
+  ];
+}