diff --git a/pkgs/development/tools/alloy/builder.sh b/pkgs/development/tools/alloy/builder.sh
new file mode 100644
index 000000000000..e737fc5eec73
--- /dev/null
+++ b/pkgs/development/tools/alloy/builder.sh
@@ -0,0 +1,16 @@
+source $stdenv/setup
+
+jar=${src##*/}
+jar=$out/share/alloy/${jar#*-}
+
+install -Dm644 $src $jar
+
+cat << EOF > alloy
+#! $SHELL
+exec $jre/bin/java -jar $jar
+EOF
+
+install -Dm755 alloy $out/bin/alloy
+
+install -Dm644 $icon $out/share/pixmaps/alloy.png
+cp -r ${desktopItem}/share/applications $out/share
diff --git a/pkgs/development/tools/alloy/default.nix b/pkgs/development/tools/alloy/default.nix
new file mode 100644
index 000000000000..d25ccc1a7a5e
--- /dev/null
+++ b/pkgs/development/tools/alloy/default.nix
@@ -0,0 +1,48 @@
+{ stdenv, fetchurl, jre, makeDesktopItem }:
+
+let version = "4.2_2015-02-22"; in
+stdenv.mkDerivation rec {
+  name = "alloy-${version}";
+
+  src = fetchurl {
+    sha256 = "0p93v8jwx9prijpikkgmfdzb9qn8ljmvga5d9wvrkxddccjx9k28";
+    url = "http://alloy.mit.edu/alloy/downloads/alloy${version}.jar";
+  };
+
+  meta = with stdenv.lib; {
+    inherit version;
+    description = "Language & tool for relational models";
+    longDescription = ''
+      Alloy is a language for describing structures and a tool for exploring
+      them. An Alloy model is a collection of constraints that describes a set
+      of structures, e.g. all the possible security configurations of a web
+      application, or all the possible topologies of a switching network. The
+      Alloy Analyzer is a solver that takes the constraints of a model and
+      finds structures that satisfy them. Structures are displayed graphically,
+      and their appearance can be customized for the domain at hand.
+    '';
+    homepage = http://alloy.mit.edu/;
+    downloadPage = http://alloy.mit.edu/alloy/download.html;
+    license = with licenses; mit;
+    platforms = with platforms; linux;
+    maintainers = with maintainers; [ nckx ];
+  };
+
+  desktopItem = makeDesktopItem rec {
+    name = "alloy";
+    exec = name;
+    icon = name;
+    desktopName = "Alloy";
+    genericName = "Relational modelling tool";
+    comment = meta.description;
+    categories = "Development;IDE;Education;";
+  };
+
+
+  buildInputs = [ jre ];
+  inherit jre;
+
+  icon = ./icon.png;
+
+  builder = ./builder.sh;
+}
diff --git a/pkgs/development/tools/alloy/icon.png b/pkgs/development/tools/alloy/icon.png
new file mode 100644
index 000000000000..a76bd9480474
Binary files /dev/null and b/pkgs/development/tools/alloy/icon.png differ
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 50f714e71c4c..c92d49fea1e8 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4912,6 +4912,8 @@ let
 
   ### DEVELOPMENT / TOOLS
 
+  alloy = callPackage ../development/tools/alloy { };
+
   augeas = callPackage ../tools/system/augeas { };
 
   ansible = callPackage ../tools/system/ansible { };