diff --git a/pkgs/tools/misc/ent/default.nix b/pkgs/tools/misc/ent/default.nix
new file mode 100644
index 00000000000..d6ad7f1d26b
--- /dev/null
+++ b/pkgs/tools/misc/ent/default.nix
@@ -0,0 +1,27 @@
+{stdenv, fetchurl, unzip}:
+
+stdenv.mkDerivation rec {
+  name = "ent-1.1";
+
+  src = fetchurl {
+    url = "http://www.fourmilab.ch/random/random.zip";
+    sha256 = "1v39jlj3lzr5f99avzs2j2z6anqqd64bzm1pdf6q84a5n8nxckn1";
+  };
+
+  # Work around the "unpacker appears to have produced no directories"
+  # case that happens when the archive doesn't have a subdirectory.
+  setSourceRoot = "sourceRoot=`pwd`";
+
+  buildInputs = [ unzip ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp ent $out/bin/
+  '';
+
+  meta = {
+    description = "Pseudorandom Number Sequence Test Program";
+    homepage = http://www.fourmilab.ch/random/;
+    platforms = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 895920061ca..79e33e9ac4a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -725,6 +725,8 @@ let
 
   enca = callPackage ../tools/text/enca { };
 
+  ent = callPackage ../tools/misc/ent { };
+
   fasd = callPackage ../tools/misc/fasd { };
 
   fop = callPackage ../tools/typesetting/fop { };