diff --git a/operation/install_pkg.sh b/operation/install_pkg.sh
index 6675a41..60ad5aa 100755
--- a/operation/install_pkg.sh
+++ b/operation/install_pkg.sh
@@ -132,11 +132,11 @@ install_pkg ()
 	fi
 
 	pkg_src=$(get_pkg_file $pkgname)
-	erv
-
-	info "installing $pkg_src to $TARGET"
-	add_pkg $pkg_src
-	erv
+    if [ "${?}" -eq 0 ];then
+        info "installing $pkg_src to $TARGET"
+        add_pkg $pkg_src
+        erv
+    fi
 }
 
 main ()