diff --git a/lib/install.ps1 b/lib/install.ps1
index 05813a1b59..4674f5751d 100644
--- a/lib/install.ps1
+++ b/lib/install.ps1
@@ -1021,7 +1021,11 @@ function prune_installed($apps, $global) {
 
 # check whether the app failed to install
 function failed($app, $global) {
-    return !(install_info $app (current_version $app $global) $global)
+    if (is_directory (appdir $app $global)) {
+        return !(install_info $app (current_version $app $global) $global)
+    } else {
+        return $false
+    }
 }
 
 function ensure_none_failed($apps, $global) {