diff --git a/pkgs/applications/misc/barrier/default.nix b/pkgs/applications/misc/barrier/default.nix
deleted file mode 100644
index 66d0cc580204..000000000000
--- a/pkgs/applications/misc/barrier/default.nix
+++ /dev/null
@@ -1,78 +0,0 @@
-{
-  lib,
-  fetchFromGitHub,
-  cmake,
-  curl,
-  xorg,
-  avahi,
-  qtbase,
-  mkDerivation,
-  openssl,
-  wrapGAppsHook3,
-  avahiWithLibdnssdCompat ? avahi.override { withLibdnssdCompat = true; },
-  fetchpatch,
-}:
-
-mkDerivation rec {
-  pname = "barrier";
-  version = "2.4.0";
-
-  src = fetchFromGitHub {
-    owner = "debauchee";
-    repo = "barrier";
-    rev = "v${version}";
-    hash = "sha256-2tHqLF3zS3C4UnOVIZfpcuzaemC9++nC7lXgFnFSfKU=";
-    fetchSubmodules = true;
-  };
-
-  patches = [
-    # This patch can be removed when a new version of barrier (greater than 2.4.0)
-    # is released, which will contain this commit.
-    (fetchpatch {
-      name = "add-missing-cstddef-header.patch";
-      url = "https://github.com/debauchee/barrier/commit/4b12265ae5d324b942698a3177e1d8b1749414d7.patch";
-      sha256 = "sha256-ajMxP7szBFi4h8cMT3qswfa3k/QiJ1FGI3q9fkCFQQk=";
-    })
-  ];
-
-  CXXFLAGS = [
-    # error: 'uint8_t' is not a member of 'std'; did you mean 'wint_t'?
-    "-include cstdint"
-  ];
-
-  buildInputs = [
-    curl
-    xorg.libX11
-    xorg.libXext
-    xorg.libXtst
-    avahiWithLibdnssdCompat
-    qtbase
-  ];
-  nativeBuildInputs = [
-    cmake
-    wrapGAppsHook3
-  ];
-
-  postFixup = ''
-    substituteInPlace "$out/share/applications/barrier.desktop" --replace "Exec=barrier" "Exec=$out/bin/barrier"
-  '';
-
-  qtWrapperArgs = [
-    ''--prefix PATH : ${lib.makeBinPath [ openssl ]}''
-  ];
-
-  meta = {
-    description = "Open-source KVM software";
-    longDescription = ''
-      Barrier is KVM software forked from Symless's synergy 1.9 codebase.
-      Synergy was a commercialized reimplementation of the original
-      CosmoSynergy written by Chris Schoeneman.
-    '';
-    homepage = "https://github.com/debauchee/barrier";
-    downloadPage = "https://github.com/debauchee/barrier/releases";
-    license = lib.licenses.gpl2;
-    maintainers = [ lib.maintainers.phryneas ];
-    platforms = lib.platforms.linux;
-    mainProgram = "barrier";
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 570db9716278..8f20ddd0dd3e 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -507,6 +507,7 @@ mapAliases {
   baserow = throw "baserow has been removed, due to lack of maintenance"; # Added 2025-08-02
   bashInteractive_5 = throw "'bashInteractive_5' has been renamed to/replaced by 'bashInteractive'"; # Converted to throw 2024-10-17
   bash_5 = throw "'bash_5' has been renamed to/replaced by 'bash'"; # Converted to throw 2024-10-17
+  barrier = throw "'barrier' has been removed as it is unmaintained. Consider 'deskflow' or 'input-leap' instead."; # Added 2025-09-29
   bareboxTools = throw "bareboxTools has been removed due to lack of interest in maintaining it in nixpkgs"; # Added 2025-04-19
   bazel_5 = throw "bazel_5 has been removed as it is EOL"; # Added 2025-08-09
   bazel_6 = throw "bazel_6 has been removed as it will be EOL by the release of Nixpkgs 25.11"; # Added 2025-08-19
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 281d3c80ad07..e7f4de9bdc67 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10984,8 +10984,6 @@ with pkgs;
 
   backintime = backintime-qt;
 
-  barrier = libsForQt5.callPackage ../applications/misc/barrier { };
-
   bespokesynth-with-vst2 = bespokesynth.override {
     enableVST2 = true;
   };