account for root level paths

packages/cli/src/utils/miscellaneous.ts

@@ -130,6 +130,9 @@ export function printExecutionTime(commandName: string, startedAt: number, api:
 }
 
 export function pathToFilename(path: string, pathSeparator: string) {
+  if (path === '/') {
+    return 'root';
+  }
   return path
     .replace(/~1/g, '/')
     .replace(/~0/g, '~')