Be more specific on Darwin

home/default.nix

@@ -1,25 +1,32 @@
 { nixpkgs, nurpkgs, home-manager, username ? builtins.getEnv "USER", ... }:
 
 let
-	homeDirectory = if username == "root" then "/root" else "/home/${username}";
-	configDir = "${homeDirectory}/.config";
-
-	pkgs = import nixpkgs {
-		config.allowUnfree = true;
-		config.xdg.configHome = configDir;
-		overlays = [
-			nurpkgs.overlay
-			(import ../overlays)
-		];
-	};
-
-	nur = import nurpkgs {
-		inherit pkgs;
-		nur = pkgs;
-	};
+	home = system:
+		if username == "root" then "/root" else
+			( if ( nixpkgs.lib.hasSuffix "-darwin" system ) then "/Users/${username}" else "/home/${username}" );
 
 	mkhome = system: gui:
-		home-manager.lib.homeManagerConfiguration rec {
+		let
+			homeDirectory = home system;
+
+			configDir = "${homeDirectory}/.config";
+
+			pkgs = import nixpkgs {
+				config.allowUnfree = true;
+				config.xdg.configHome = configDir;
+				overlays = [
+					nurpkgs.overlay
+					(import ../overlays)
+				];
+			};
+
+			nur = import nurpkgs {
+				inherit pkgs;
+				nur = pkgs;
+			};
+
+
+		in home-manager.lib.homeManagerConfiguration rec {
 			inherit pkgs system username homeDirectory;
 			stateVersion = "22.05";
 			configuration = import ./home.nix username {
@@ -32,4 +39,5 @@ in {
 	"aarch64-nogui" = mkhome "aarch64-linux" false;
 	"x86_64-gui" = mkhome "x86_64-linux" true;
 	"x86_64-nogui" = mkhome "x86_64-linux" false;
+	"x86_64-darwin" = mkhome "x86_64-darwin" true;
 }

overlays/hms.nix

@@ -3,16 +3,19 @@
 pkgs.writeShellScriptBin "hms" ''
 set -eo pipefail
 # Build different targets with GUI or not
-if [ -z "$DISPLAY" ]; then
-	target="nogui"
-else
-	target="gui"
-fi
 
+arch="$(uname -m)"
 if [ "$(uname -s)" == "Darwin" ]; then
+	# On macOS
 	src="$HOME/.config/nix/"
-	target=gui
+	target="''${arch}-darwin"
 else
+	# On Linux/WSL2 systems
+	if [ -z "$DISPLAY" ]; then
+		target="''${arch}-nogui"
+	else
+		target="''${arch}-gui"
+	fi
 	src=/etc/nixos
 fi
 
@@ -20,7 +23,7 @@ fi
 echo "Building $(uname -m)-$target"
 dest=$(mktemp -d)
 pushd "$dest" > /dev/null
-nix build --impure "$src#homeConfigurations.$(uname -m)-$target.activationPackage"
+nix build --impure "$src#homeConfigurations.$target.activationPackage"
 ./result/activate
 popd > /dev/null
 rm -r "$dest"