diff --git a/pkgs/by-name/si/signal-backup-deduplicator/package.nix b/pkgs/by-name/si/signal-backup-deduplicator/package.nix
new file mode 100644
index 000000000000..d5efff9e3f4d
--- /dev/null
+++ b/pkgs/by-name/si/signal-backup-deduplicator/package.nix
@@ -0,0 +1,38 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitLab,
+  cmake,
+  cryptopp,
+  protobuf,
+}:
+
+stdenv.mkDerivation {
+  pname = "signal-backup-deduplicator";
+  version = "0-unstable-2024-05-24";
+
+  src = fetchFromGitLab {
+    owner = "gerum";
+    repo = "signal-backup-deduplicator";
+    rev = "6c09f14b16ff47c2ed0914c68102e45c93ebbfa6";
+    hash = "sha256-JR2Qu4EtTMObM/BvxQS5WwGFqWj9g0bqOpKt4y5UNaM=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  buildInputs = [
+    protobuf
+    cryptopp
+  ];
+
+  meta = {
+    description = "Generate chunked backups for Signal messages";
+    homepage = "https://gitlab.com/gerum/signal-backup-deduplicator";
+    license = lib.licenses.agpl3Only;
+    maintainers = with lib.maintainers; [ GaetanLepage ];
+    mainProgram = "signal_backup_deduplicate";
+    platforms = lib.platforms.all;
+    # ld: symbol(s) not found for architecture ...
+    broken = stdenv.isDarwin;
+  };
+}