diff --git a/README.md b/README.md
index 55ee598..e4b5385 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,13 @@
 
 This is a small project to allow you to specify a [Gitea](https://github.com/go-gitea/) configuration in a declarative manner, and to resolve differences between intended and actual config.
 
-# How to build
+# How to build and run
 
-Just `dotnet build`.
+With Nix: `nix run github:Smaug123/dotnet-gitea-declarative -- --help`.
+The config file you provide as an argument should conform to [the schema](./Gitea.Declarative.Lib/GiteaConfig.schema.json).
+
+## Building from source
+
+Just clone and `dotnet build`.
 
 To upgrade the NuGet dependencies in the flake, run `nix build .#fetchDeps` and copy the resulting file into `nix/deps.nix`.
diff --git a/flake.nix b/flake.nix
index b9f3568..5002be4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -72,6 +72,12 @@
           dotnet-runtime = dotnet-runtime;
         };
       };
+      apps = {
+        default = {
+          type = "app";
+          program = "${self.packages.${system}.default}/bin/Gitea.Declarative";
+        };
+      };
       devShell = pkgs.mkShell {
         buildInputs = with pkgs; [
           (with dotnetCorePackages;