diff --git a/packages/plugin-repo-cli/index.ts b/packages/plugin-repo-cli/index.ts
index e9c87952a..965842a06 100644
--- a/packages/plugin-repo-cli/index.ts
+++ b/packages/plugin-repo-cli/index.ts
@@ -51,6 +51,8 @@ async function extractPluginFilesFromPackage(existingManifests: any, workDir: st
 
 	const pluginDir = resolveRelativePathWithinDir(workDir, 'node_modules', packageName, 'publish');
 
+	if (!(await fs.pathExists(pluginDir))) throw new Error(`Could not find publish directory at ${pluginDir}`);
+
 	const files = await fs.readdir(pluginDir);
 	const manifestFilePath = path.resolve(pluginDir, files.find((f: any) => path.extname(f) === '.json'));
 	const pluginFilePath = path.resolve(pluginDir, files.find((f: any) => path.extname(f) === '.jpl'));
diff --git a/packages/tools/tool-utils.ts b/packages/tools/tool-utils.ts
index 800a40f7d..11fa88eb5 100644
--- a/packages/tools/tool-utils.ts
+++ b/packages/tools/tool-utils.ts
@@ -147,7 +147,7 @@ export function execCommand(command: string, options: any = null): Promise<strin
 	});
 }
 
-export function resolveRelativePathWithinDir(baseDir: string, ...relativePath: string[]) {
+export function resolveRelativePathWithinDir(baseDir: string, ...relativePath: string[]): string {
 	const path = require('path');
 	const resolvedBaseDir = path.resolve(baseDir);
 	const resolvedPath = path.resolve(baseDir, ...relativePath);