diff --git a/pkgs/applications/window-managers/fbpanel/default.nix b/pkgs/applications/window-managers/fbpanel/default.nix
index c7bba46ec051..66a3741d3654 100644
--- a/pkgs/applications/window-managers/fbpanel/default.nix
+++ b/pkgs/applications/window-managers/fbpanel/default.nix
@@ -1,24 +1,53 @@
-{ stdenv, fetchurl, builderDefs, libX11, gtk, pkgconfig, libXmu
-, libXpm, libpng, libjpeg, libtiff, librsvg }:
+x@{builderDefsPackage
+  , libX11, gtk, pkgconfig, libXmu
+  , libXpm, libpng, libjpeg, libtiff, librsvg
+  , ...}:
+builderDefsPackage
+(a :  
+let 
+  helperArgNames = ["stdenv" "fetchurl" "builderDefsPackage"] ++ 
+    [];
 
-	let localDefs = builderDefs.passthru.function {
-		src = /* put a fetchurl here */
-	fetchurl {
-		url = http://garr.dl.sourceforge.net/sourceforge/fbpanel/fbpanel-4.12.tgz;
-		sha256 = "0zv0zkq6w4h7dk0ji8bm9cqpj2qxv3ss161mqg9y68shvxvmfrlz";
-	};
+  buildInputs = map (n: builtins.getAttr n x)
+    (builtins.attrNames (builtins.removeAttrs x helperArgNames));
+  sourceInfo = rec {
+    baseName="fbpanel";
+    version="6.1";
+    name="${baseName}-${version}";
+    url="mirror://sourceforge/${baseName}/${name}.tbz2";
+    hash="e14542cc81ea06e64dd4708546f5fd3f5e01884c3e4617885c7ef22af8cf3965";
+  };
+in
+rec {
+  src = a.fetchurl {
+    url = sourceInfo.url;
+    sha256 = sourceInfo.hash;
+  };
+
+  inherit (sourceInfo) name version;
+  inherit buildInputs;
+
+  /* doConfigure should be removed if not needed */
+  phaseNames = ["setVars" "doUnpack" "fixPaths" "doConfigure" "doMakeInstall"];
+
+  fixPaths=(a.doPatchShebangs ".");
+  setVars = a.fullDepEntry ''
+    export NIX_LDFLAGS="$NIX_LDFLAGS -lX11"
+  '' [];
+      
+  meta = {
+    description = "${abort ''Specify description''}";
+    maintainers = with a.lib.maintainers;
+    [
+      raskin
+    ];
+    platforms = with a.lib.platforms;
+      linux;
+  };
+  passthru = {
+    updateInfo = {
+      downloadPage = "fbpanel.sourceforge.net";
+    };
+  };
+}) x
 
-		buildInputs = [libX11 gtk pkgconfig libXmu libXpm 
-		  libpng libjpeg libtiff librsvg];
-		configureFlags = [];
-	}; /* null is a terminator for sumArgs */
-	in with localDefs;
-stdenv.mkDerivation rec {
-	name = "fbpanel-4.12";
-	builder = writeScript (name + "-builder")
-		(textClosure localDefs [doConfigure doMakeInstall doForceShare doPropagate]);
-	meta = {
-		description = "Just a desktop panel";
-		inherit src;
-	};
-}