Fix nix build

.github/workflows/nix-cache.yml

@@ -3,16 +3,16 @@ on:
   pull_request:
   push:
 jobs:
-  tests:
+  build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v17
-      with:
-        nix_path: nixpkgs=channel:nixos-unstable
-    - uses: cachix/cachix-action@v11
-      with:
-        name: xplr
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-    - run: nix-build
-    - run: nix-shell --run "xplr --version"
+      - uses: actions/checkout@v3
+      - uses: nixbuild/nix-quick-install-action@v19
+        with:
+          nix_conf: experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v11
+        with:
+          name: xplr
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - run: nix-build
+      - run: nix-shell --run "xplr --version"

flake.lock

@@ -1,5 +1,20 @@
 {
   "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1668199800,
@@ -17,6 +32,7 @@
     },
     "root": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
     }

flake.nix

@@ -2,20 +2,25 @@
   description = "xplr - A hackable, minimal, fast TUI file explorer";
 
   inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
     nixpkgs.url = "github:nixos/nixpkgs";
   };
 
-  outputs = { self, nixpkgs }:
-    {
-      packages.x86_64-linux.default =
-        with import nixpkgs { system = "x86_64-linux"; };
-
-        rustPlatform.buildRustPackage rec {
-          name = "xplr";
-          src = ./.;
-          cargoLock = {
-            lockFile = ./Cargo.lock;
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem
+      (system:
+        let pkgs = nixpkgs.legacyPackages.${system}; in
+        rec {
+          packages = flake-utils.lib.flattenTree {
+            xplr = pkgs.rustPlatform.buildRustPackage rec {
+              name = "xplr";
+              src = ./.;
+              cargoLock = {
+                lockFile = ./Cargo.lock;
+              };
+            };
           };
-        };
-    };
+          defaultPackage = packages.xplr;
+        }
+      );
 }