4 files changed, 26 insertions, 1 deletions
diff --git a/third_party/lisp/npg/.skip-subtree b/third_party/lisp/npg/.skip-subtree
new file mode 100644
index 000000000000..5051f60d6b86
--- /dev/null
+++ b/third_party/lisp/npg/.skip-subtree
@@ -0,0 +1 @@
+prevent readTree from creating entries for subdirs that don't contain an .nix files
diff --git a/third_party/lisp/npg/OWNERS b/third_party/lisp/npg/OWNERS
new file mode 100644
index 000000000000..f16dd105d761
--- /dev/null
+++ b/third_party/lisp/npg/OWNERS
@@ -0,0 +1,3 @@
+inherited: true
+owners:
+  - sterni
diff --git a/third_party/lisp/npg/README b/third_party/lisp/npg/README
index c69ef9080a76..a1661e744a37 100644
--- a/third_party/lisp/npg/README
+++ b/third_party/lisp/npg/README
@@ -3,6 +3,13 @@
 			   for Common Lisp
 
 	 Copyright (C) 2003-2006, 2010 by Walter C. Pelissero
+	 Copyright (C) 2021 by the TVL Authors
+
+Vendored into depot as it is a dependency of mime4cl and upstream has
+become inactive. Upstream and depot version may diverge.
+
+Upstream Website: http://wcp.sdf-eu.org/software/#npg
+Vendored Tarball: http://wcp.sdf-eu.org/software/npg-20150517T144652.tbz
 
 This library is  free software; you can redistribute  it and/or modify
 it  under  the terms  of  the GNU  Lesser  General  Public License  as
@@ -36,6 +43,6 @@ though.
 
 Multiple concurrent parsers are supported.
 
-To compile, an ASDF file is provided.
+To compile, an ASDF and nix file are provided.
 
 See the examples directory for clues on how to use it.
diff --git a/third_party/lisp/npg/default.nix b/third_party/lisp/npg/default.nix
new file mode 100644
index 000000000000..af7ec53eaf93
--- /dev/null
+++ b/third_party/lisp/npg/default.nix
@@ -0,0 +1,14 @@
+# Copyright (C) 2021 by the TVL Authors
+# SPDX-License-Identifier: LGPL-2.1-or-later
+{ depot, pkgs, ... }:
+
+depot.nix.buildLisp.library {
+  name = "npg";
+
+  srcs = [
+    ./src/package.lisp
+    ./src/common.lisp
+    ./src/define.lisp
+    ./src/parser.lisp
+  ];
+}