diff --git a/nix/docker/default.nix b/nix/docker/default.nix
index 45fde74de..a3128e620 100644
--- a/nix/docker/default.nix
+++ b/nix/docker/default.nix
@@ -26,7 +26,7 @@ let
       # pandoc  # just for manual testing within the pod, remove for production, since we use the library instead!
       curl wget # just for manual testing within the pod, remove for production!
       openldap  # just for manual testing within the pod, remove for production!
-      
+      build-essentials
     ] ++ optionals isDemo [ postgresql_12 memcached uniworx.uniworx.components.exes.uniworxdb ];
 
     runAsRoot = ''