1 files changed, 19 insertions, 0 deletions
diff --git a/third_party/lisp/closer-mop.nix b/third_party/lisp/closer-mop.nix
new file mode 100644
index 000000000000..145b9cfd4325
--- /dev/null
+++ b/third_party/lisp/closer-mop.nix
@@ -0,0 +1,19 @@
+# Closer to MOP is a compatibility layer that rectifies many of the
+# absent or incorrect CLOS MOP features across a broad range of Common
+# Lisp implementations
+{ depot, pkgs, ... }:
+
+let src = with pkgs; srcOnly lispPackages.closer-mop;
+in depot.nix.buildLisp.library {
+  name = "closer-mop";
+
+  srcs = [
+    "${src}/closer-mop-packages.lisp"
+    "${src}/closer-mop-shared.lisp"
+    {
+      sbcl = "${src}/closer-sbcl.lisp";
+      ecl = "${src}/closer-ecl.lisp";
+      ccl = "${src}/closer-clozure.lisp";
+    }
+  ];
+}