diff --git a/pkgs/data/themes/breath-theme/default.nix b/pkgs/data/themes/breath-theme/default.nix
deleted file mode 100644
index 1c3206515099..000000000000
--- a/pkgs/data/themes/breath-theme/default.nix
+++ /dev/null
@@ -1,48 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitLab,
-  cmake,
-  extra-cmake-modules,
-  kdecoration,
-  plasma-workspace,
-  qtbase,
-}:
-
-stdenv.mkDerivation {
-  pname = "breath-theme";
-  version = "unstable-2022-12-22";
-
-  src = fetchFromGitLab {
-    domain = "gitlab.manjaro.org";
-    owner = "themes";
-    group = "artwork";
-    repo = "breath";
-    rev = "98822e7d903f16116bfb02ff9921824c139d7bbc";
-    sha256 = "sha256-gvzhHOuOhxV3TC3UZeVpxeSDLpCJV+SaapcJ5mbHskY=";
-  };
-
-  nativeBuildInputs = [
-    cmake
-    extra-cmake-modules
-
-    kdecoration
-    plasma-workspace
-    qtbase
-  ];
-
-  dontWrapQtApps = true;
-
-  cmakeFlags = [
-    "-DBUILD_PLASMA_THEMES=ON"
-    "-DBUILD_SDDM_THEME=ON"
-  ];
-
-  meta = with lib; {
-    description = "Manjaro KDE default theme";
-    homepage = "https://gitlab.manjaro.org/artwork/themes/breath";
-    license = licenses.cc-by-sa-40;
-    maintainers = with maintainers; [ huantian ];
-    platforms = platforms.linux;
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index aa4d44746d08..aece44a19e8e 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -376,6 +376,7 @@ mapAliases {
   bpb = throw "bpb has been removed as it is unmaintained and not compatible with recent Rust versions"; # Added 2024-04-30
   bpftool = throw "'bpftool' has been renamed to/replaced by 'bpftools'"; # Converted to throw 2024-10-17
   brasero-original = lib.warnOnInstantiate "Use 'brasero-unwrapped' instead of 'brasero-original'" brasero-unwrapped; # Added 2024-09-29
+  breath-theme = throw "'breath-theme' has been removed, as it is only compatible with Plasma 5, which is EOL"; # Added 2025-08-20
   bridgand = throw "'brigand' has been removed due to being unmaintained"; # Added 2025-04-30
   bs-platform = throw "'bs-platform' was removed as it was broken, development ended and 'melange' has superseded it"; # Added 2024-07-29
   buf-language-server = throw "'buf-language-server' was removed as its development has moved to the 'buf' package"; # Added 2024-11-15
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2ee3e6f0b9e2..eb6fd1131fef 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11155,8 +11155,6 @@ with pkgs;
 
   bibata-cursors-translucent = callPackage ../data/icons/bibata-cursors/translucent.nix { };
 
-  breath-theme = libsForQt5.callPackage ../data/themes/breath-theme { };
-
   colloid-kde = libsForQt5.callPackage ../data/themes/colloid-kde { };
 
   dejavu_fonts = lowPrio (callPackage ../data/fonts/dejavu-fonts { });