diff --git a/pkgs/by-name/co/colloid-gtk-theme/package.nix b/pkgs/by-name/co/colloid-gtk-theme/package.nix
deleted file mode 100644
index 79d6bd2c1687..000000000000
--- a/pkgs/by-name/co/colloid-gtk-theme/package.nix
+++ /dev/null
@@ -1,103 +0,0 @@
-{
-  lib,
-  stdenvNoCC,
-  fetchFromGitHub,
-  gtk-engine-murrine,
-  jdupes,
-  sassc,
-  themeVariants ? [ ], # default: blue
-  colorVariants ? [ ], # default: all
-  sizeVariants ? [ ], # default: standard
-  tweaks ? [ ],
-}:
-
-let
-  pname = "colloid-gtk-theme";
-
-in
-lib.checkListOfEnum "colloid-gtk-theme: theme variants"
-  [
-    "default"
-    "purple"
-    "pink"
-    "red"
-    "orange"
-    "yellow"
-    "green"
-    "teal"
-    "grey"
-    "all"
-  ]
-  themeVariants
-  lib.checkListOfEnum
-  "colloid-gtk-theme: color variants"
-  [ "standard" "light" "dark" ]
-  colorVariants
-  lib.checkListOfEnum
-  "colloid-gtk-theme: size variants"
-  [ "standard" "compact" ]
-  sizeVariants
-  lib.checkListOfEnum
-  "colloid-gtk-theme: tweaks"
-  [
-    "nord"
-    "dracula"
-    "gruvbox"
-    "everforest"
-    "catppuccin"
-    "all"
-    "black"
-    "rimless"
-    "normal"
-    "float"
-  ]
-  tweaks
-
-  stdenvNoCC.mkDerivation
-  (finalAttrs: {
-    inherit pname;
-    version = "2025-07-31";
-
-    src = fetchFromGitHub {
-      owner = "vinceliuice";
-      repo = "colloid-gtk-theme";
-      tag = finalAttrs.version;
-      hash = "sha256-0pXbeeBAkk6v2DBWfUYhWWdyrQhgr/JfDbhyS33maMM=";
-    };
-
-    nativeBuildInputs = [
-      jdupes
-      sassc
-    ];
-
-    propagatedUserEnvPkgs = [
-      gtk-engine-murrine
-    ];
-
-    postPatch = ''
-      patchShebangs install.sh
-    '';
-
-    installPhase = ''
-      runHook preInstall
-
-      name= HOME="$TMPDIR" ./install.sh \
-        ${lib.optionalString (themeVariants != [ ]) "--theme " + toString themeVariants} \
-        ${lib.optionalString (colorVariants != [ ]) "--color " + toString colorVariants} \
-        ${lib.optionalString (sizeVariants != [ ]) "--size " + toString sizeVariants} \
-        ${lib.optionalString (tweaks != [ ]) "--tweaks " + toString tweaks} \
-        --dest $out/share/themes
-
-      jdupes --quiet --link-soft --recurse $out/share
-
-      runHook postInstall
-    '';
-
-    meta = {
-      description = "Modern and clean Gtk theme";
-      homepage = "https://github.com/vinceliuice/Colloid-gtk-theme";
-      license = lib.licenses.gpl3Only;
-      platforms = lib.platforms.unix;
-      maintainers = [ lib.maintainers.romildo ];
-    };
-  })
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 63b28ef33aab..981d830fbca0 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -575,6 +575,7 @@ mapAliases {
   code-browser-qt = throw "'code-browser-qt' has been removed, as it was broken since 22.11"; # Added 2025-08-22
   CoinMP = throw "'CoinMP' has been renamed to/replaced by 'coinmp'"; # Converted to throw 2025-10-27
   collada2gltf = throw "collada2gltf has been removed from Nixpkgs, as it has been unmaintained upstream for 5 years and does not build with supported GCC versions"; # Addd 2025-08-08
+  colloid-gtk-theme = throw "'colloid-gtk-theme' 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
   colloid-kde = throw "'colloid-kde' has been removed, as it is only compatible with Plasma 5, which is EOL"; # Added 2025-08-20
   colorstorm = throw "'colorstorm' has been removed because it was unmaintained in nixpkgs and upstream was rewritten."; # Added 2025-06-15
   commonsBcel = warnAlias "'commonsBcel' has been renamed to 'commons-bcel'" commons-bcel; # Added 2026-02-08