move everything into own nix files

flake.nix

@@ -3,11 +3,28 @@
 
   outputs = { self, nixpkgs }:
   let
-    pkgs = import nixpkgs { system = "x86_64-linux"; };
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+    scope = pkgs.lib.makeScope pkgs.newScope (final: {
+      pigeon-toolchain = pkgs.buildEnv {
+        name = "pigeon-toolchain";
+        paths = with pkgs; [ bash coreutils gcc gnumake util-linux ];
+      };
+      pigeon-init     = final.callPackage ./init.nix { };
+      pigeon-run      = final.callPackage ./run.nix { };
+      pigeon-rootfs   = final.callPackage ./rootfs.nix { };
+      pigeon-kernel   = final.callPackage ./kernel.nix { };
+      pigeon-vmconfig = final.callPackage ./vmconfig.nix { };
+      pigeon-vm       = final.callPackage ./vm.nix { };
+      pigeon-hooks    = final.callPackage ./hooks.nix { };
+      pigeon-webhook  = final.callPackage ./webhook.nix { };
+    });
   in {
-    packages.x86_64-linux.pigeon-kernel = pkgs.callPackage ./kernel/kernel.nix { };
-    packages.x86_64-linux.pigeon-rootfs = pkgs.callPackage ./rootfs/rootfs.nix {
-      pigeon-toolchain = with pkgs; [ bash coreutils gcc gnumake util-linux ];
+    packages.${system} = {
+      inherit (scope)
+        pigeon-toolchain
+        pigeon-init pigeon-run pigeon-rootfs pigeon-kernel pigeon-vmconfig pigeon-vm
+        pigeon-hooks pigeon-webhook;
     };
   };
-}    
+}