diff --git a/pkgs/tools/filesystems/dosfstools/default.nix b/pkgs/tools/filesystems/dosfstools/default.nix
index 7ef741753ba..1eef38979d0 100644
--- a/pkgs/tools/filesystems/dosfstools/default.nix
+++ b/pkgs/tools/filesystems/dosfstools/default.nix
@@ -1,24 +1,17 @@
-{builderDefs}: with builderDefs;
-       let localDefs = builderDefs.passthru.function (rec {
-         src = /* put a fetchurl here */
-           fetchurl {
-            url = http://www.daniel-baumann.ch/software/dosfstools/dosfstools-3.0.1.tar.bz2;
-            sha256 = "7fab0de42391277028071d01ff4da83ff9a399408ccf29958cdee62ffe746d45";
-           };
+{ stdenv, fetchurl }:
 
-        buildInputs = [];
-        configureFlags = [];
-        makeFlags = " PREFIX=$out ";
-    });
-    in with localDefs;
 stdenv.mkDerivation rec {
-    name = "dosfstools-3.01";
-    builder = writeScript (name + "-builder")
-        (textClosure localDefs 
-            ["doMakeInstall" doForceShare doPropagate]);
-    meta = {
-        description = "Dosfstools - utilities for vfat file system.";
-	homepage = "http://www.daniel-baumann.ch/software/dosfstools/";
-        inherit src;
-    };
+  name = "dosfstools-3.09";
+
+  src = fetchurl {
+    url = http://www.daniel-baumann.ch/software/dosfstools/dosfstools-3.0.1.tar.bz2;
+    sha256 = "7fab0de42391277028071d01ff4da83ff9a399408ccf29958cdee62ffe746d45";
+  };
+
+  makeFlags = "PREFIX=$(out)";
+
+  meta = {
+    description = "Utilities for creating and checking FAT and VFAT file systems";
+    homepage = http://www.daniel-baumann.ch/software/dosfstools/;
+  };
 }