fix(core): Allow loading nodes from multiple custom directories (#11130)

packages/cli/src/load-nodes-and-credentials.ts

@@ -260,7 +260,7 @@ export class LoadNodesAndCredentials {
 		dir: string,
 	) {
 		const loader = new constructor(dir, this.excludeNodes, this.includeNodes);
-		if (loader.packageName in this.loaders) {
+		if (loader instanceof PackageDirectoryLoader && loader.packageName in this.loaders) {
 			throw new ApplicationError(
 				picocolors.red(
 					`nodes package ${loader.packageName} is already loaded.\n Please delete this second copy at path ${dir}`,