diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 5cc753130ff5..481938ebec86 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -377,10 +377,10 @@ mapAliases {
 
   inherit (libsForQt5.mauiPackages) buho; # added 2022-05-17
   bwidget = tclPackages.bwidget; # Added 2024-10-02
-  # Shorter names; keep the longer name for back-compat. Added 2023-04-11. Warning added on 2024-12-16
-  buildFHSUserEnv = lib.warnOnInstantiate "'buildFHSUserEnv' has been renamed to 'buildFHSEnv' and will be removed in 25.11" buildFHSEnv;
-  buildFHSUserEnvChroot = lib.warnOnInstantiate "'buildFHSUserEnvChroot' has been renamed to 'buildFHSEnvChroot' and will be removed in 25.11" buildFHSEnvChroot;
-  buildFHSUserEnvBubblewrap = lib.warnOnInstantiate "'buildFHSUserEnvBubblewrap' has been renamed to 'buildFHSEnvBubblewrap' and will be removed in 25.11" buildFHSEnvBubblewrap;
+  # Shorter names; keep the longer name for back-compat. Added 2023-04-11. Warning added on 2024-12-16. Removed on 2025-05-31
+  buildFHSUserEnv = throw "'buildFHSUserEnv' has been renamed to 'buildFHSEnv' and was removed in 25.11";
+  buildFHSUserEnvChroot = throw "'buildFHSUserEnvChroot' has been renamed to 'buildFHSEnvChroot' and was removed in 25.11";
+  buildFHSUserEnvBubblewrap = throw "'buildFHSUserEnvBubblewrap' has been renamed to 'buildFHSEnvBubblewrap' and was removed in 25.11";
 
   # bitwarden_rs renamed to vaultwarden with release 1.21.0 (2021-04-30)
   bitwarden_rs = vaultwarden;