diff --git a/pkgs/development/tools/build-managers/simple-build-tool/default.nix b/pkgs/development/tools/build-managers/simple-build-tool/default.nix
index e446bf1c1eb3..13a216799a2d 100644
--- a/pkgs/development/tools/build-managers/simple-build-tool/default.nix
+++ b/pkgs/development/tools/build-managers/simple-build-tool/default.nix
@@ -1,93 +1,30 @@
-{ stdenv, versionedDerivation, fetchurl, version ? "xsbt-0.12.3" }:
+{ stdenv, fetchurl, jre }:
 
-let
+stdenv.mkDerivation rec {
+  name = "sbt-${version}";
+  version = "0.13.0";
 
-      description = "A build tool for Scala";
-      longDescription = name: ''
-        ${name} is a simple build tool for Scala projects that aims to do the
-        basics well.
-
-        This package is the sbt launcher which automatically manages
-        and downloads dependencies, including the SBT package and the
-        Scala compiler.
-      '';
-
-      metaSBT = {
-        inherit description;
-        longDescription = longDescription "sbt";
-        homepage = http://code.google.com/p/simple-build-tool/;
-        license = "bsd";
-      };
-
-      metaXSBT = {
-        inherit description;
-        longDescription = longDescription "xsbt";
-        homepage = https://github.com/harrah/xsbt;
-        license = "bsd";
-      };
-
-in
-
-# Depends on a JRE at runtime.
-
-versionedDerivation "simple-build-tool" version {
-  "0.7.3" = let version = "0.7.3"; in {
-    name = "simple-build-tool-${version}";
-    src = fetchurl {
-      url = "http://simple-build-tool.googlecode.com/files/sbt-launch-${version}.jar";
-      sha256 = "1nciifzf00cs54a4h57a7v1hyklm5vgln0sscmz5kzv96ggphs6k";
-    };
-    meta = metaSBT;
+  src = fetchurl {
+    url = "http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt-launch/${version}/sbt-launch.jar";
+    sha256 = "04s49v5mw4kwz1rmvbf07kq51i2m0lcv60c9i5y524gjj518pk1w";
   };
 
-  "0.7.7" = let version = "0.7.7"; in {
-    name = "simple-build-tool-${version}";
-    src = fetchurl {
-      url = "http://simple-build-tool.googlecode.com/files/sbt-launch-${version}.jar";
-      # sha256 = "1nciifzf00cs54a4h57a7v1hyklm5vgln0sscmz5kzv96ggphs6j";
-      sha256 = "2720b033012a7509f7fbdfddfa69c07b105452a6f95bc410cb7dc34c1594ab3d";
-    };
-    meta = metaSBT;
-  };
-
-  "xsbt-0.11.2" = let version = "0.11.2"; in { # scala 2.9
-    name = "xsbt-${version}";
-
-    # scala needs much more PermGen space
-    javaArgs = "-Xmx1024M";
-    # from https://github.com/harrah/xsbt/wiki/Getting-Started-Setup
-    src = fetchurl {
-      url = http://typesafe.artifactoryonline.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt-launch/0.11.2/sbt-launch.jar;
-      sha256 = "14fbzvb1s66wpbqznw65a7nn27qrq1i9pd7wlbydv8ffl49d262n";
-    };
-    meta = metaXSBT;
-  };
-
-  "xsbt-0.12.3" = let version = "0.12.3"; in {
-    name = "xsbt-${version}";
-
-    # Recommended java options from sbt Getting started guide
-    javaArgs = "-Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=384M";
-    # from https://github.com/harrah/xsbt/wiki/Getting-Started-Setup
-    src = fetchurl {
-      url = http://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt-launch/0.12.3/sbt-launch.jar;
-      sha256 = "11r26abjzmnmpn65ndbq60qg31s3ichkvzpmxyrq941s1n1dbxgh";
-    };
-    meta = metaXSBT;
-  };
-}
-{
+  phases = [ "installPhase" ];
 
   installPhase = ''
-    mkdir -pv "$out/lib/java"
-    cp $src "$out/lib/java/sbt-launch-${version}.jar"
-    mkdir -p "$out/bin"
-    cat > "$out/bin/sbt" <<EOF
-    #! /bin/sh
-    exec java $javaArgs -jar $out/lib/java/sbt-launch-${version}.jar "\$@"
+    mkdir -p $out/bin
+    cat > $out/bin/sbt << EOF
+    #!/bin/sh
+    SBT_OPTS="-Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=384M"
+    ${jre}/bin/java $SBT_OPTS -jar ${src} "\$@"
     EOF
-    chmod u+x "$out/bin/sbt"
+    chmod +x $out/bin/sbt
   '';
 
-  phases = "installPhase";
+  meta = { 
+    homepage = http://www.scala-sbt.org/;
+    license = stdenv.lib.licenses.bsd3;
+    description = "A build tool for Scala, Java and more";
+    maintainers = [ stdenv.lib.maintainers.rickynils ];  
+  };  
 }