Desktop/vscode: configure nil to use nixpkgs-fmt to format

roles/common/programs/helix.nix

@@ -22,12 +22,17 @@
           indent-guides.render = true;
         };
       };
-      languages = [
-        {
-          name = "nix";
-          formatter.command = "nixpkgs-fmt";
-        }
-      ];
+    };
+    # The builtin languages options have issues
+    # https://github.com/nix-community/home-manager/issues/3299
+    xdg.configFile."helixLanguages" = {
+      target = "helix/languages.toml";
+      text = ''
+        [language-server.nil]
+        config.nil.formatting.command = [ "nixpkgs-fmt" ]
+        [[language]]
+        name = "nix"
+      '';
     };
   };
 }

roles/desktop/programs/vscode.nix

@@ -2,31 +2,39 @@
 let inputs = flakeSelf.inputs; in
 {
 	nixpkgs.overlays = [ inputs.catppuccin-vsc.overlays.default ];
-	home-manager.users.toast.programs.vscode = {
-		enable = true;
-		package = pkgs.vscodium;
-		mutableExtensionsDir = false;
-		extensions = with inputs.vscode-extensions.extensions.x86_64-linux.open-vsx; [
-			jnoortheen.nix-ide
-			(pkgs.catppuccin-vsc.override {
-				workbenchMode = "flat";
-				extraBordersEnabled = true;
-			})
-			catppuccin.catppuccin-vsc-icons
-			waderyan.gitblame
+	home-manager.users.toast = {
+		home.packages = with pkgs; [
+			nixpkgs-fmt
 		];
-		userSettings = {
-			# VSCode doesn't like nested settings
-			# https://stackoverflow.com/questions/74134436/is-it-possible-to-express-settings-in-vs-codes-settings-json-where-each-dot-sep
-			# TODO: write a function that unnests settings
-			"workbench.colorTheme" = "Catppuccin Mocha";
-			"workbench.iconTheme" = "catppuccin-mocha";
-			"editor.fontFamily" = "JetBrainsMono Nerd Font";
-			"editor.semanticHighlighting.enabled" = true;
-			"nix.enableLanguageServer" = true;
-			"nix.serverPath" = "${pkgs.nil}/bin/nil";
-			"terminal.integrated.minimumContrastRatio" = 1;
-			"window.titleBarStyle" = "custom";
+		programs.vscode = {
+			enable = true;
+			package = pkgs.vscodium;
+			mutableExtensionsDir = false;
+			extensions = with inputs.vscode-extensions.extensions.x86_64-linux.open-vsx; [
+				jnoortheen.nix-ide
+				(pkgs.catppuccin-vsc.override {
+					workbenchMode = "flat";
+					extraBordersEnabled = true;
+				})
+				catppuccin.catppuccin-vsc-icons
+				waderyan.gitblame
+			];
+			userSettings = {
+				# VSCode doesn't like nested settings
+				# https://stackoverflow.com/questions/74134436/is-it-possible-to-express-settings-in-vs-codes-settings-json-where-each-dot-sep
+				# TODO: write a function that unnests settings
+				"workbench.colorTheme" = "Catppuccin Mocha";
+				"workbench.iconTheme" = "catppuccin-mocha";
+				"editor.fontFamily" = "JetBrainsMono Nerd Font";
+				"editor.semanticHighlighting.enabled" = true;
+				"nix.enableLanguageServer" = true;
+				"nix.serverPath" = "${pkgs.nil}/bin/nil";
+				"nix.serverSettings" = {
+					"nil"."formatting"."command" = [ "nixpkgs-fmt" ];
+				};
+				"terminal.integrated.minimumContrastRatio" = 1;
+				"window.titleBarStyle" = "custom";
+			};
 		};
 	};
 }