diff --git a/Keys/MainWindowAwareKeyListener.h b/Keys/MainWindowAwareKeyListener.h
index 6f5a7df..a76348c 100644
--- a/Keys/MainWindowAwareKeyListener.h
+++ b/Keys/MainWindowAwareKeyListener.h
@@ -65,7 +65,7 @@ protected:
             workspaceNode = getModel()->getRoot()->findWorkspaceByName(std::to_string(newWorkspace));
         } while (workspaceNode != nullptr
             && (workspaceNode->childCount() != 0
-            || (preferredOutput != nullptr && preferredOutput == workspaceNode->findOutput())));
+            || (preferredOutput != nullptr && preferredOutput != workspaceNode->findOutput())));
 
         return std::to_string(newWorkspace);
     }
diff --git a/flake.nix b/flake.nix
index e71d1fb..e177bb0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,7 +21,8 @@
       default = pkgs.mkShell {
         packages = with pkgs; [
           # base toolchain
-          gcc12
+          gcc13
+          gdb
           clang
           libgcc
           qt6.full