diff --git a/pkgs/by-name/se/semiphemeral/package.nix b/pkgs/by-name/se/semiphemeral/package.nix
deleted file mode 100644
index 90f419d35432..000000000000
--- a/pkgs/by-name/se/semiphemeral/package.nix
+++ /dev/null
@@ -1,38 +0,0 @@
-{
-  lib,
-  python3,
-  fetchPypi,
-}:
-
-python3.pkgs.buildPythonApplication rec {
-  pname = "semiphemeral";
-  version = "0.7";
-  pyproject = true;
-
-  src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-KRi3zfRWGRZJjQ6KPqBI9wQ6yU8Ohx0TDtA5qoak35U=";
-  };
-
-  doCheck = false; # upstream has no tests
-
-  pythonImportsCheck = [ "semiphemeral" ];
-
-  build-system = with python3.pkgs; [ setuptools ];
-
-  dependencies = with python3.pkgs; [
-    click
-    sqlalchemy
-    flask
-    tweepy
-    colorama
-  ];
-
-  meta = with lib; {
-    description = "Automatically delete your old tweets, except for the ones you want to keep";
-    homepage = "https://github.com/micahflee/semiphemeral";
-    license = licenses.mit;
-    maintainers = with maintainers; [ amanjeev ];
-    mainProgram = "semiphemeral";
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 0d1aeb310259..07f90ae7de94 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1365,6 +1365,7 @@ mapAliases {
   SDL2_classic_ttf = throw "'SDL2_classic_ttf' has been removed as part of the deprecation of 'SDL2_classic'. Consider upgrading to 'SDL2_ttf' built with 'sdl2-compat'."; # Added 2025-05-20
   seafile-server = throw "'seafile-server' has been removed as it is unmaintained"; # Added 2025-08-21
   seahub = throw "'seahub' has been removed as it is unmaintained"; # Added 2025-08-21
+  semiphemeral = throw "'semiphemeral' has been removed as it is archived upstream"; # Added 2025-11-06
   sequoia = throw "'sequoia' has been renamed to/replaced by 'sequoia-sq'"; # Converted to throw 2025-10-27
   session-desktop-appimage = throw "'session-desktop-appimage' has been renamed to/replaced by 'session-desktop'"; # Converted to throw 2025-10-27
   setserial = throw "'setserial' has been removed as it had been abandoned upstream"; # Added 2025-05-18