workflow releases

flake.nix

@@ -0,0 +1,33 @@
+{
+  description = "NixOS Base Image";
+
+  inputs = {
+    # nixpkgs repo for system packages
+    nixpkgs.url = "github:nixos/nixpkgs";
+    # nixos-generators lets us produce a "proxmox"-formatted image
+    nixos-generators = {
+      url = "github:nix-community/nixos-generators";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, nixos-generators,... }:
+    {
+      packages.x86_64-linux = {
+        base = nixos-generators.nixosGenerate {
+          system = "x86_64-linux";
+          modules = [
+            {
+              # Pin nixpkgs to the flake input, so that the packages installed
+              # come from the flake inputs.nixpkgs.url.
+              nix.registry.nixpkgs.flake = nixpkgs;
+              # set disk size to to 20G
+              # virtualisation.diskSize = 20 * 1024;
+            }
+            ./configuration.nix
+          ];
+          format  = "proxmox";  # outputs a .vma.zst suitable for qmrestore
+        };
+      };
+    };
+}