diff --git a/pkgs/tools/X11/runningx/default.nix b/pkgs/tools/X11/runningx/default.nix
new file mode 100644
index 000000000000..a4b3f05c94c1
--- /dev/null
+++ b/pkgs/tools/X11/runningx/default.nix
@@ -0,0 +1,34 @@
+{ stdenv, fetchurl, pkgconfig, libX11 }:
+
+stdenv.mkDerivation rec {
+  name = "runningx-${version}";
+  version = "1.0";
+  
+  src = fetchurl {
+    url = "http://www.fiction.net/blong/programs/mutt/autoview/RunningX.c";
+    sha256 = "1mikkhrx6jsx716041qdy3nwjac08pxxvxyq2yablm8zg9hrip0d";
+  };
+
+  nativeBuildInputs = [ pkgconfig ];
+
+  buildInputs = [ libX11 ];
+
+  phases = [ "buildPhase" "installPhase" ];
+
+  buildPhase = ''
+    gcc -O2 -o RunningX $(pkg-config --cflags --libs x11) $src
+  '';
+
+  installPhase = ''
+    mkdir -p "$out"/bin
+    cp -vai RunningX "$out/bin"
+  '';
+
+  meta = {
+    homepage = http://www.fiction.net/blong/programs/mutt/;
+    description = "A program for testing if X is running";
+    license = stdenv.lib.licenses.free;
+    platforms = stdenv.lib.platforms.unix;
+    maintainers = [ stdenv.lib.maintainers.romildo ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dbc671c985e7..d59798b64857 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3206,6 +3206,8 @@ in
 
   rubber = callPackage ../tools/typesetting/rubber { };
 
+  runningx = callPackage ../tools/X11/runningx { };
+
   runzip = callPackage ../tools/archivers/runzip { };
 
   rxp = callPackage ../tools/text/xml/rxp { };