Remove Apache licence and add licence section to readme.

README.md

@@ -2,3 +2,11 @@
 
 This repository contains [Nix](https://nixos.org/) packages and environments used by [lowRISC](https://lowrisc.org).
 These packages and environments are *not supported* by lowRISC or recommended to be used outside of lowRISC.
+
+## License
+
+This package repository is licensed under the [MIT License](LICENSE).
+
+The following important clarification made in the [`nixpkgs`](https://github.com/NixOS/nixpkgs/blob/master/README.md#license) repository applies to this repository as well:
+> MIT license does not apply to the packages built by Nixpkgs, merely to the files in this repository (the Nix expressions, build scripts, NixOS modules, etc.).
+> It also might not apply to patches included in Nixpkgs, which may be derivative works of the packages to which they apply.The aforementioned artifacts are all covered by the licenses of the respective packages.

flake.nix

@@ -1,7 +1,6 @@
 # Copyright lowRISC Contributors.
-# Licensed under both the MIT License and the Apache License, Version 2.
-# See LICENSE-MIT and LICENSE-APACHE for details.
-# SPDX-License-Identifier: MIT OR Apache-2.0
+# Licensed under the MIT License, see LICENSE for details.
+# SPDX-License-Identifier: MIT
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";

pkgs/default.nix

@@ -1,7 +1,6 @@
 # Copyright lowRISC Contributors.
-# Licensed under both the MIT License and the Apache License, Version 2.
-# See LICENSE-MIT and LICENSE-APACHE for details.
-# SPDX-License-Identifier: MIT OR Apache-2.0
+# Licensed under the MIT License, see LICENSE for details.
+# SPDX-License-Identifier: MIT
 {
   pkgs,
   inputs,

pkgs/python_ot/default.nix

@@ -1,7 +1,6 @@
 # Copyright lowRISC Contributors.
-# Licensed under both the MIT License and the Apache License, Version 2.
-# See LICENSE-MIT and LICENSE-APACHE for details.
-# SPDX-License-Identifier: MIT OR Apache-2.0
+# Licensed under the MIT License, see LICENSE for details.
+# SPDX-License-Identifier: MIT
 {
   inputs,
   pkgs,

pkgs/python_ot/python.nix

@@ -1,7 +1,6 @@
 # Copyright lowRISC Contributors.
-# Licensed under both the MIT License and the Apache License, Version 2.
-# See LICENSE-MIT and LICENSE-APACHE for details.
-# SPDX-License-Identifier: MIT OR Apache-2.0
+# Licensed under the MIT License, see LICENSE for details.
+# SPDX-License-Identifier: MIT
 #
 # Hack, see https://github.com/charlottia/hdx/pull/1
 {...} @ inputs: let

pkgs/python_ot/sitecustomize.py

@@ -1,8 +1,7 @@
 # Copyright lowRISC Contributors
 # Copyright Nixpkgs/NixOS Contributors
-# Licensed under both the MIT License and the Apache License, Version 2.
-# See LICENSE-MIT and LICENSE-APACHE for details.
-# SPDX-License-Identifier: MIT OR Apache-2.0
+# Licensed under the MIT License, see LICENSE for details.
+# SPDX-License-Identifier: MIT
 
 """
 This is a Nix-specific module for discovering modules built with Nix.

pkgs/verilator/default.nix

@@ -1,7 +1,6 @@
 # Copyright lowRISC Contributors.
-# Licensed under both the MIT License and the Apache License, Version 2.
-# See LICENSE-MIT and LICENSE-APACHE for details.
-# SPDX-License-Identifier: MIT OR Apache-2.0
+# Licensed under the MIT License, see LICENSE for details.
+# SPDX-License-Identifier: MIT
 {pkgs, ...}:
 pkgs.verilator.overrideAttrs rec {
   version = "4.210";