Update Nix flake

Author: lopsided98

.github/workflows/build.yaml

@@ -6,13 +6,6 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-      with:
-          # Nix Flakes doesn't work on shallow clones
-          fetch-depth: 0
-    - uses: cachix/install-nix-action@v12
-      with:
-        install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-3.0pre20201007_5257a25/install
-        extra_nix_config: |
-          experimental-features = nix-command flakes
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v31
     - run: nix build

default.nix

@@ -1,12 +1,15 @@
-{ lib, fetchFromGitHub, buildPythonApplication, requests, pyyaml, netifaces
-, beautifulsoup4, black, flake8 }:
+{ lib, fetchFromGitHub, buildPythonApplication, setuptools, requests, pyyaml
+, netifaces, beautifulsoup4, black, flake8 }:
 
 buildPythonApplication {
   pname = "dnsupdate";
   version = "0.4";
+  pyproject = true;
 
   src = ./.;
 
+  nativeBuildInputs = [ setuptools ];
+
   propagatedBuildInputs = [ requests pyyaml netifaces beautifulsoup4 ];
 
   checkInputs = [ black flake8 ];
@@ -22,5 +25,6 @@ buildPythonApplication {
     license = licenses.gpl3;
     maintainers = with maintainers; [ lopsided98 ];
     platforms = platforms.all;
+    mainProgram = "dnsupdate";
   };
 }

flake.lock

@@ -10,16 +10,11 @@
     eachSystem allSystems (system: let
       pkgs = nixpkgs.legacyPackages.${system};
     in {
-      defaultPackage = pkgs.python3Packages.callPackage ./. { };
+      packages.default = pkgs.python3Packages.callPackage ./. { };
 
-      defaultApp = {
-        type = "app";
-        program = "${self.defaultPackage.${system}}/bin/dnsupdate";
-      };
-
-      devShell = self.defaultPackage.${system};
+      devShells.default = self.packages.${system}.default;
     }) //
     eachSystem [ "x86_64-linux" ] (system: {
-      hydraJobs.build = self.defaultPackage.${system};
+      hydraJobs.build = self.packages.${system}.default;
     });
 }