diff --git a/packages/core.gbapp/services/GBDeployer.ts b/packages/core.gbapp/services/GBDeployer.ts
index f3b0e0cb..546f74ad 100644
--- a/packages/core.gbapp/services/GBDeployer.ts
+++ b/packages/core.gbapp/services/GBDeployer.ts
@@ -809,7 +809,7 @@ export class GBDeployer implements IGBDeployer {
 
       GBLog.info(`Installing modules default.gbui (It may take a few minutes)...`);
       
-      child_process.execSync(`yarn install`, { cwd: root });
+      child_process.execSync(`${npm} install`, { cwd: root });
 
       GBLog.info(`Transpiling default.gbui...`);
       child_process.execSync(`${npm} run build`, { cwd: root });