From 8f041b017caaec50d4980a96b13f559d15991c84 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Sat, 16 Nov 2024 17:13:55 +0800
Subject: [PATCH] switch to oxalica rust overlay

---
 flake.lock | 41 +++++++++++++++++++++++------------------
 flake.nix  | 30 ++++++++++++------------------
 2 files changed, 35 insertions(+), 36 deletions(-)

diff --git a/flake.lock b/flake.lock
index 0e67bb9..b56795a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,21 +1,5 @@
 {
   "nodes": {
-    "mozilla-overlay": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1704373101,
-        "narHash": "sha256-+gi59LRWRQmwROrmE1E2b3mtocwueCQqZ60CwLG+gbg=",
-        "owner": "mozilla",
-        "repo": "nixpkgs-mozilla",
-        "rev": "9b11a87c0cc54e308fa83aac5b4ee1816d5418a2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "mozilla",
-        "repo": "nixpkgs-mozilla",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1727540905,
@@ -34,8 +18,29 @@
     },
     "root": {
       "inputs": {
-        "mozilla-overlay": "mozilla-overlay",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1719454714,
+        "narHash": "sha256-MojqG0lyUINkEk0b3kM2drsU5vyaF8DFZe/FAlZVOGs=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "d1c527659cf076ecc4b96a91c702d080b213801e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "ref": "snapshot/2024-08-01",
+        "repo": "rust-overlay",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 869822f..d43222e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,30 +2,24 @@
   description = "Bare-metal Rust on Zynq-7000";
 
   inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-24.05;
-  inputs.mozilla-overlay = { url = github:mozilla/nixpkgs-mozilla; flake = false; };
+  inputs.rust-overlay = {
+    url = "github:oxalica/rust-overlay?ref=snapshot/2024-08-01";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
 
-  outputs = { self, nixpkgs, mozilla-overlay }:
+  outputs = { self, nixpkgs, rust-overlay }:
     let
-      pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ (import mozilla-overlay) crosspkgs-overlay ]; };
+      pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ (import rust-overlay) crosspkgs-overlay ]; };
       
-      rustManifest = pkgs.fetchurl {
-        url = "https://static.rust-lang.org/dist/2021-01-29/channel-rust-nightly.toml";
-        sha256 = "sha256-EZKgw89AH4vxaJpUHmIMzMW/80wAFQlfcxRoBD9nz0c=";
+      rust = pkgs.rust-bin.nightly."2021-01-28".default.override {
+        extensions = [ "rust-src" ];
+        targets = [ ];
       };
-      rustTargets = [];
-      rustChannelOfTargets = _channel: _date: targets:
-        (pkgs.lib.rustLib.fromManifestFile rustManifest {
-          inherit (pkgs) stdenv lib fetchurl patchelf;
-          }).rust.override {
-          inherit targets;
-          extensions = ["rust-src"];
-        };
-      rust = rustChannelOfTargets "nightly" null rustTargets;
-      rustPlatform = pkgs.recurseIntoAttrs (pkgs.makeRustPlatform {
+      rustPlatform = pkgs.makeRustPlatform {
         rustc = rust;
         cargo = rust;
-      });
-      
+      };
+
       # https://doc.rust-lang.org/rustc/linker-plugin-lto.html#toolchain-compatibility
       llvmPackages_11 = pkgs.recurseIntoAttrs (pkgs.callPackage (import ./llvm/11) ({
         inherit (pkgs.stdenvAdapters) overrideCC;