diff --git a/pkgs/development/libraries/fmt/default.nix b/pkgs/development/libraries/fmt/default.nix
index 01b2b6828611..3edf0692e439 100644
--- a/pkgs/development/libraries/fmt/default.nix
+++ b/pkgs/development/libraries/fmt/default.nix
@@ -69,11 +69,6 @@ let
     };
 in
 {
-  fmt_8 = generic {
-    version = "8.1.1";
-    hash = "sha256-leb2800CwdZMJRWF5b1Y9ocK0jXpOX/nwo95icDf308=";
-  };
-
   fmt_9 = generic {
     version = "9.1.0";
     hash = "sha256-rP6ymyRc7LnKxUXwPpzhHOQvpJkpnRFOt2ctvUNlYI0=";
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 1446446b7d6c..dd2ad607389f 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -382,6 +382,7 @@ mapAliases {
   flutter316 = throw "flutter316 has been removed because it isn't updated anymore, and no packages in nixpkgs use it. If you still need it, use flutter.mkFlutter to get a custom version"; # Added 2024-10-05
   flutter322 = throw "flutter322 has been removed because it isn't updated anymore, and no packages in nixpkgs use it. If you still need it, use flutter.mkFlutter to get a custom version"; # Added 2024-10-05
   flutter323 = throw "flutter323 has been removed because it isn't updated anymore, and no packages in nixpkgs use it. If you still need it, use flutter.mkFlutter to get a custom version"; # Added 2024-10-05
+  fmt_8 = throw "fmt_8 has been removed as it is obsolete and was no longer used in the tree"; # Added 2024-11-12
   foldingathome = throw "'foldingathome' has been renamed to/replaced by 'fahclient'"; # Converted to throw 2024-10-17
   forgejo-actions-runner = forgejo-runner; # Added 2024-04-04
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dd650846aab1..10b1e3a191c5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9188,7 +9188,7 @@ with pkgs;
   fltk = fltk13;
   fltk-minimal = fltk13-minimal;
 
-  inherit (callPackages ../development/libraries/fmt { }) fmt_8 fmt_9 fmt_10 fmt_11;
+  inherit (callPackages ../development/libraries/fmt { }) fmt_9 fmt_10 fmt_11;
 
   fmt = fmt_10;