Try less outdated nix

.github/workflows/ci-nix.yml

@@ -8,8 +8,6 @@ on:
   # Triggers the workflow on push or pull request events but only for the "main" branch
   push:
     branches: [ "main", "master", "devel" ]
-  pull_request:
-    branches: [ "main", "master", "devel" ]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -21,9 +19,9 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V28
+      - uses: cachix/install-nix-action@v30
         with:
-          nix_path: nixpkgs=channel:nixos-23.05
+          nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v15
         with:
           name: cargo-crev
@@ -47,9 +45,9 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V28
+      - uses: cachix/install-nix-action@v30
         with:
-          nix_path: nixpkgs=channel:nixos-23.05
+          nix_path: nixpkgs=channel:nixos-unstable
       - uses: cachix/cachix-action@v15
         with:
           name: cargo-crev

flake.nix

@@ -2,7 +2,7 @@
   description = "Cryptographically verifiable Code REviews";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
     crane.url = "github:ipetkov/crane";
     crane.inputs.nixpkgs.follows = "nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";
@@ -24,18 +24,17 @@
         };
         lib = pkgs.lib;
 
-        fenix-channel = fenix.packages.${system}.stable;
+        fenix-channel = fenix.packages.${system}.latest;
 
         fenix-toolchain = (fenix-channel.withComponents [
           "rustc"
           "cargo"
           "clippy"
-          "rust-analysis"
           "rust-src"
           "llvm-tools-preview"
         ]);
 
-        craneLib = crane.lib.${system}.overrideToolchain fenix-toolchain;
+        craneLib = (crane.mkLib pkgs).overrideToolchain fenix-toolchain;
 
         # filter source code at path `src` to include only the list of `modules`
         filterModules = modules: src: