feat: more explicit error message

packages/cli/src/lib/packager/config.ts

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+import chalk from 'chalk';
 import fs from 'fs-extra';
 import { relative as relativePath } from 'path';
 import peerDepsExternal from 'rollup-plugin-peer-deps-external';
@@ -42,7 +43,9 @@ export const makeConfigs = async (
   if (!declarationsExist) {
     const path = relativePath(paths.targetDir, typesInput);
     throw new Error(
-      `No declaration files found at ${path}, be sure to run tsc to generate .d.ts files before packaging`,
+      `No declaration files found at ${path}, be sure to run ${chalk.bgRed.white(
+        'yarn tsc',
+      )} to generate .d.ts files before packaging`,
     );
   }