diff --git a/bsc/clsync/default.nix b/bsc/clsync/default.nix
new file mode 100644
index 0000000..4c2a80d
--- /dev/null
+++ b/bsc/clsync/default.nix
@@ -0,0 +1,54 @@
+{ stdenv
+, fetchFromGitHub
+, libcap
+, libcgroup
+, libmhash
+, doxygen
+, graphviz
+, autoreconfHook
+, pkg-config
+, glib
+}:
+
+let
+  version = "0.4.4";
+
+in stdenv.mkDerivation {
+  pname = "clsync";
+  inherit version;
+
+  src = fetchFromGitHub {
+    repo = "clsync";
+    owner = "clsync";
+    rev = "v${version}";
+    sha256 = "0sdiyfwp0iqr6l1sirm51pirzmhi4jzgky5pzfj24nn71q3fwqgz";
+  };
+
+  outputs = [ "out" "dev" ];
+
+  buildInputs = [
+    autoreconfHook
+    libcap
+    libcgroup
+    libmhash
+    doxygen
+    graphviz
+    pkg-config
+    glib
+  ];
+
+  preConfigure = ''
+    ./configure --help
+  '';
+
+  enableParallelBuilding = true;
+
+  meta = with stdenv.lib; {
+    description = "File live sync daemon based on inotify/kqueue/bsm (Linux, FreeBSD), written in GNU C";
+    homepage = "https://github.com/clsync/clsync";
+    license = licenses.gpl3Plus;
+    maintainers = [ ];
+    platforms = platforms.linux;
+  };
+}
+
diff --git a/default.nix b/default.nix
index 048fdcb..a3a2028 100644
--- a/default.nix
+++ b/default.nix
@@ -9,6 +9,9 @@ let
 
   self.bsc = rec {
 
+    nixpkgs = pkgs;
+
+
     # Load the default implementation
     #mpi = mpich;
     #mpi = openmpi;
@@ -195,6 +198,8 @@ let
       nixUnstable
       nixFlakes;
 
+    clsync = callPackage ./bsc/clsync/default.nix { };
+
     nixStatic = (callPackageStatic ./bsc/nix/static.nix {
         callPackage = callPackageWith (pkgs.pkgsStatic);
         storeDir = "/nix/store";