diff --git a/pkgs/by-name/th/theme-obsidian2/package.nix b/pkgs/by-name/th/theme-obsidian2/package.nix
deleted file mode 100644
index 38f9f38405e6..000000000000
--- a/pkgs/by-name/th/theme-obsidian2/package.nix
+++ /dev/null
@@ -1,49 +0,0 @@
-{
-  lib,
-  stdenvNoCC,
-  fetchurl,
-  gtk-engine-murrine,
-  jdupes,
-  gitUpdater,
-}:
-
-stdenvNoCC.mkDerivation rec {
-  pname = "theme-obsidian2";
-  version = "2.25";
-
-  src = fetchurl {
-    url = "https://github.com/madmaxms/theme-obsidian-2/releases/download/v${version}/obsidian-2-theme.tar.xz";
-    sha256 = "sha256-Hajz2bFcsi+9kSjxuZ6Jav8t7S6trDUF5yJivw+Vypw=";
-  };
-
-  sourceRoot = ".";
-
-  nativeBuildInputs = [
-    jdupes
-  ];
-
-  propagatedUserEnvPkgs = [
-    gtk-engine-murrine
-  ];
-
-  installPhase = ''
-    runHook preInstall
-    mkdir -p $out/share/themes
-    cp -a Obsidian-2* $out/share/themes
-    jdupes --quiet --link-soft --recurse $out/share
-    runHook postInstall
-  '';
-
-  passthru.updateScript = gitUpdater {
-    url = "https://github.com/madmaxms/theme-obsidian-2";
-    rev-prefix = "v";
-  };
-
-  meta = {
-    description = "Gnome theme based upon Adwaita-Maia dark skin";
-    homepage = "https://github.com/madmaxms/theme-obsidian-2";
-    license = lib.licenses.gpl3Only;
-    platforms = lib.platforms.linux;
-    maintainers = [ lib.maintainers.romildo ];
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index f8b3f8adeab4..ca5d5b52a701 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -2353,6 +2353,7 @@ mapAliases {
   thefuck = throw "'thefuck' has been removed due to lack of maintenance upstream and incompatible with python 3.12+. Consider using 'pay-respects' instead"; # Added 2025-05-30
   theLoungePlugins = throw "'theLoungePlugins' has been removed due to only containing throws"; # Added 2025-09-25
   theme-jade1 = throw "'theme-jade1' has been removed because it depended on 'gtk-engine-murrine', which was removed because it was unmaintained upstream and depended on GTK 2."; # Added 2026-07-22
+  theme-obsidian2 = throw "'theme-obsidian2' has been removed because it depended on 'gtk-engine-murrine', which was removed because it was unmaintained upstream and depended on GTK 2."; # Added 2026-07-22
   thinkingRock = throw "'thinkingRock' has been removed due to being unmaintained decades old software"; # Added 2026-02-12
   thrust = throw "'thrust' has been removed due to lack of maintenance"; # Added 2025-08-21
   thunderbird-128 = throw "Thunderbird 128 support ended in August 2025"; # Added 2025-09-30