diff --git a/pkgs/development/compilers/ecj/builder.sh b/pkgs/development/eclipse/ecj/builder.sh
similarity index 100%
rename from pkgs/development/compilers/ecj/builder.sh
rename to pkgs/development/eclipse/ecj/builder.sh
diff --git a/pkgs/development/compilers/ecj/default.nix b/pkgs/development/eclipse/ecj/default.nix
similarity index 100%
rename from pkgs/development/compilers/ecj/default.nix
rename to pkgs/development/eclipse/ecj/default.nix
diff --git a/pkgs/development/eclipse/jdt-sdk/builder.sh b/pkgs/development/eclipse/jdt-sdk/builder.sh
new file mode 100755
index 00000000000..8c0e0ac44ea
--- /dev/null
+++ b/pkgs/development/eclipse/jdt-sdk/builder.sh
@@ -0,0 +1,7 @@
+set -e
+
+. $stdenv/setup
+
+unzip $src 
+mkdir $out
+mv eclipse $out/
diff --git a/pkgs/development/eclipse/jdt-sdk/default.nix b/pkgs/development/eclipse/jdt-sdk/default.nix
new file mode 100644
index 00000000000..4734522b5f4
--- /dev/null
+++ b/pkgs/development/eclipse/jdt-sdk/default.nix
@@ -0,0 +1,12 @@
+{stdenv, fetchurl, unzip}:
+
+stdenv.mkDerivation {
+  name = "eclipse-jdt-sdk-3.1";
+  builder = ./builder.sh;
+  src = fetchurl {
+    url = http://sunsite.informatik.rwth-aachen.de/eclipse/downloads/drops/R-3.1-200506271435/eclipse-JDT-SDK-3.1.zip;
+    md5 = "665b51beaa718b2fec6b0155ed369f76";
+  };
+
+  buildInputs = [unzip];
+}
diff --git a/pkgs/system/all-packages-generic.nix b/pkgs/system/all-packages-generic.nix
index a1e725daaaa..3c8ba63a16f 100644
--- a/pkgs/system/all-packages-generic.nix
+++ b/pkgs/system/all-packages-generic.nix
@@ -482,11 +482,15 @@ rec {
     inherit fetchurl stdenv;
   };
 
-  ecj = (import ../development/compilers/ecj) {
+  ecj = (import ../development/eclipse/ecj) {
     inherit fetchurl stdenv unzip j2re;
     ant  = apacheAntBlackdown14;
   };
 
+  jdtsdk = (import ../development/eclipse/jdt-sdk) {
+    inherit fetchurl stdenv unzip;
+  };
+
   blackdown = (import ../development/compilers/blackdown) {
     inherit fetchurl stdenv;
   };