diff --git a/pkgs/development/tools/parsing/antlr/4.nix b/pkgs/development/tools/parsing/antlr/4.nix
index c30d235c4f8e..6051dbf384e4 100644
--- a/pkgs/development/tools/parsing/antlr/4.nix
+++ b/pkgs/development/tools/parsing/antlr/4.nix
@@ -199,15 +199,4 @@ in
         ./utf8cpp.patch
       ];
     }).antlr;
-
-  antlr4_8 =
-    (mkAntlr {
-      version = "4.8";
-      sourceSha256 = "1qal3add26qxskm85nk7r758arladn5rcyjinmhlhznmpbbv9j8m";
-      jarSha256 = "0nms976cnqyr1ndng3haxkmknpdq6xli4cpf4x4al0yr21l9v93k";
-      extraCppBuildInputs = lib.optional stdenv.hostPlatform.isLinux libuuid;
-      extraCppCmakeFlags = [
-        (lib.cmakeBool "ANTLR4_INSTALL" true)
-      ];
-    }).antlr;
 }
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 48b601634ca9..827e51eeef6a 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -457,6 +457,7 @@ mapAliases {
   apacheKafka_3_7 = throw "apacheKafka_2_8 through _3_8 have been removed from nixpkgs as outdated"; # Added 2025-09-27
   apacheKafka_3_8 = throw "apacheKafka_2_8 through _3_8 have been removed from nixpkgs as outdated"; # Added 2025-09-27
   antimicroX = throw "'antimicroX' has been renamed to/replaced by 'antimicrox'"; # Converted to throw 2024-10-17
+  antlr4_8 = throw "antlr4_8 has been removed. Consider using a more recent version of antlr4"; # Added 2025-10-20
   apacheAnt = ant; # Added 2024-11-28
   apparmor-kernel-patches = throw "'apparmor-kernel-patches' has been removed as they were unmaintained, irrelevant and effectively broken"; # Added 2025-04-20
   appimagekit = throw "'appimagekit' has been removed as it was broken in nixpkgs and archived upstream"; # Added 2025-04-19
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ecbf644f5d5d..6600f9cc5eba 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6203,7 +6203,6 @@ with pkgs;
   antlr3 = antlr3_5;
 
   inherit (callPackages ../development/tools/parsing/antlr/4.nix { })
-    antlr4_8
     antlr4_9
     antlr4_10
     antlr4_11