generalize

flake-parts/default.nix

@@ -0,0 +1,35 @@
+# An opinionated module that creates flake outputs based on a known directory structure.
+#
+# cf. Convention over configuration
+{ inputs, self, ... }:
+let
+  inherit (inputs.nixpkgs) lib;
+in
+{
+
+  flake = {
+    darwinConfigurations = inputs.nixpkgs.lib.mapAttrs'
+      (fn: _:
+        let
+          inherit (inputs.nixpkgs) lib;
+          hostname = lib.removeSuffix ".nix" fn;
+        in
+        lib.nameValuePair hostname (self.nixos-flake.lib.mkMacosSystem
+          { home-manager = true; }
+          "${self}/configurations/darwin/${fn}")
+      )
+      (builtins.readDir "${self}/configurations/darwin");
+
+    nixosConfigurations = inputs.nixpkgs.lib.mapAttrs'
+      (fn: _:
+        let
+          inherit (inputs.nixpkgs) lib;
+          hostname = lib.removeSuffix ".nix" fn;
+        in
+        lib.nameValuePair hostname (self.nixos-flake.lib.mkLinuxSystem
+          { home-manager = true; }
+          "${self}/configurations/nixos/${fn}")
+      )
+      (builtins.readDir "${self}/configurations/nixos");
+  };
+}

flake.nix

@@ -44,21 +44,10 @@
         ./home
         ./nixos
         ./nix-darwin
+        ./flake-parts
       ];
 
 
-      flake = {
-        darwinConfigurations.appreciate =
-          self.nixos-flake.lib.mkMacosSystem
-            { home-manager = true; }
-            ./configurations/darwin/appreciate.nix;
-
-        nixosConfigurations.immediacy =
-          self.nixos-flake.lib.mkLinuxSystem
-            { home-manager = true; }
-            ./configurations/nixos/immediacy.nix;
-      };
-
       perSystem = { self', inputs', pkgs, system, config, ... }: {
         # My Ubuntu VM
         legacyPackages.homeConfigurations."srid@ubuntu" =