diff --git a/doc/language-support.xml b/doc/language-support.xml
index 47729a1b4ba9..6cc028c0b0a2 100644
--- a/doc/language-support.xml
+++ b/doc/language-support.xml
@@ -196,17 +196,18 @@ twisted = buildPythonPackage {
 </section>
 
 
-<!--
-<section><title>Haskell</title>
+<section><title>Java</title>
 
-<para>TODO</para>
+<para>Java packages should install JAR files in
+<filename>$out/lib/java</filename>.</para>
 
 </section>
 
 
-<section><title>Java</title>
+<!--
+<section><title>Haskell</title>
 
-<para>TODO; Java support needs lots of improvement</para>
+<para>TODO</para>
 
 </section>
 
diff --git a/pkgs/tools/misc/jdiskreport/builder.sh b/pkgs/tools/misc/jdiskreport/builder.sh
index 1e73b674c157..cdc5f94bde0c 100644
--- a/pkgs/tools/misc/jdiskreport/builder.sh
+++ b/pkgs/tools/misc/jdiskreport/builder.sh
@@ -2,13 +2,14 @@ source $stdenv/setup
 
 unzip $src
 
-mkdir -p $out/jars
-mv */*.jar $out/jars
-jar=$(ls $out/jars/jdiskreport-*.jar)
+jar=$(ls */*.jar)
+
+mkdir -p $out/lib/java
+mv $jar $out/lib/java
 
 mkdir -p $out/bin
 cat > $out/bin/jdiskreport <<EOF
 #! $SHELL -e
-exec $jdk/bin/java -jar $jar
+exec $jre/bin/java -jar $out/lib/java/$(basename $jar)
 EOF
 chmod +x $out/bin/jdiskreport
diff --git a/pkgs/tools/misc/jdiskreport/default.nix b/pkgs/tools/misc/jdiskreport/default.nix
index 7a4de418a8c3..2457668d5b02 100644
--- a/pkgs/tools/misc/jdiskreport/default.nix
+++ b/pkgs/tools/misc/jdiskreport/default.nix
@@ -1,22 +1,22 @@
-{ stdenv, fetchurl, unzip, jdk }:
+{ stdenv, fetchurl, unzip, jre }:
 
 stdenv.mkDerivation rec {
   name = "jdiskreport-1.4.0";
-  
+
   builder = ./builder.sh;
-  
+
   src = fetchurl {
     url = http://www.jgoodies.com/download/jdiskreport/jdiskreport-1_4_0.zip;
     sha256 = "0kx43480p89wlyza94lzqygqfafsdf964syc2c24q28y42psz4kd";
   };
-  
+
   buildInputs = [ unzip ];
-  
-  inherit jdk;
+
+  inherit jre;
 
   meta = {
     homepage = http://www.jgoodies.com/freeware/jdiskreport/;
     description = "A graphical utility to visualize disk usage";
     license = "unfree-redistributable";
-  };  
+  };
 }