diff --git a/flake.nix b/flake.nix
index b7c7f88..db8d14b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -116,6 +116,8 @@
         ln -s ${src} $out
       '';
 
+      fts5-icu-tokenizer = pkgs.callPackage ./nix/fts5-icu-tokenizer/package.nix { };
+
       inherit (datasources.packages.${system}) jmdict radkfile kanjidic2;
 
       database-tool = pkgs.callPackage ./nix/database_tool.nix {
diff --git a/nix/fts5-icu-tokenizer/0001-provide-sqlite-externally.patch b/nix/fts5-icu-tokenizer/0001-provide-sqlite-externally.patch
new file mode 100644
index 0000000..63f30a7
--- /dev/null
+++ b/nix/fts5-icu-tokenizer/0001-provide-sqlite-externally.patch
@@ -0,0 +1,20 @@
+diff --git i/CMakeLists.txt w/CMakeLists.txt
+index 9d99543..11ce4a4 100644
+--- i/CMakeLists.txt
++++ w/CMakeLists.txt
+@@ -131,6 +131,15 @@ if(NOT SQLite3_FOUND)
+   endif()
+ endif()
+ 
++if(SQLite3_FOUND AND NOT TARGET SQLite3::SQLite3)
++  add_library(SQLite3::SQLite3 UNKNOWN IMPORTED)
++
++  set_target_properties(SQLite3::SQLite3 PROPERTIES
++    IMPORTED_LOCATION "${SQLite3_LIBRARIES}"
++    INTERFACE_INCLUDE_DIRECTORIES "${SQLite3_INCLUDE_DIRS}"
++  )
++endif()
++
+ # --- Configure the Library ---
+ 
+ # Select source files based on API version
diff --git a/nix/fts5-icu-tokenizer/package.nix b/nix/fts5-icu-tokenizer/package.nix
new file mode 100644
index 0000000..3c756f2
--- /dev/null
+++ b/nix/fts5-icu-tokenizer/package.nix
@@ -0,0 +1,40 @@
+{
+  lib,
+  stdenv,
+  fetchFromSourcehut,
+  cmake,
+  pkg-config,
+  icu,
+  sqlite,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "fts5-icu-tokenizer";
+  version = "5.5";
+  src = fetchFromSourcehut {
+    vc = "hg";
+    owner = "~cwt";
+    repo = "fts5-icu-tokenizer";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-7Klsu9d1sY+W0buo6kwYdCyDA/u2dBTgu6WuttomTBo=";
+  };
+
+  patches = [
+    ./0001-provide-sqlite-externally.patch
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    icu
+    sqlite
+  ];
+
+  cmakeFlags = [
+    (lib.cmakeFeature "LOCALE" "ja")
+    (lib.cmakeFeature "API_VERSION" "v2")
+  ];
+})