Use local overseer binary for MCP server

overlays/overseer.nix

@@ -1,24 +1,25 @@
 {inputs}: final: prev: let
 	manifest = (prev.lib.importTOML "${inputs.overseer}/overseer/Cargo.toml").package;
 in {
-	overseer = prev.rustPlatform.buildRustPackage {
-		pname = manifest.name;
-		version = manifest.version;
+	overseer =
+		prev.rustPlatform.buildRustPackage {
+			pname = manifest.name;
+			version = manifest.version;
 
-		cargoLock.lockFile = "${inputs.overseer}/overseer/Cargo.lock";
+			cargoLock.lockFile = "${inputs.overseer}/overseer/Cargo.lock";
 
-		src = "${inputs.overseer}/overseer";
+			src = "${inputs.overseer}/overseer";
 
-		nativeBuildInputs = with prev; [
-			pkg-config
-		];
+			nativeBuildInputs = with prev; [
+				pkg-config
+			];
 
-		buildInputs = with prev; [
-			openssl
-		];
+			buildInputs = with prev; [
+				openssl
+			];
 
-		OPENSSL_NO_VENDOR = 1;
+			OPENSSL_NO_VENDOR = 1;
 
-		doCheck = false;
-	};
+			doCheck = false;
+		};
 }

profiles/opencode.nix

@@ -83,7 +83,7 @@
 				overseer = {
 					enabled = true;
 					type = "local";
-					command = ["npx" "-y" "@dmmulroy/overseer" "mcp"];
+					command = ["${pkgs.overseer}/bin/os" "mcp"];
 				};
 			};
 		};