nixpkgs/pkgs/development/tools/build-managers/sbt/default.nix

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{ stdenv, fetchurl, writeScript, bash, jre }:
let
sbt = writeScript "sbt.sh" ''
#!${bash}/bin/bash
${jre}/bin/java -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled \
-XX:MaxPermSize=384M -jar @out@/lib/sbt-launch.jar "$@"
'';
in stdenv.mkDerivation rec {
name = "sbt-${version}";
version = "0.12.3";
src = fetchurl {
url = "http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/${version}/sbt.tgz";
sha256 = "154ydaxd6ink5sy4flzpyh47nnhgkxwpzmml8q16am7655fpib08";
};
installPhase = ''
mkdir -p $out/lib $out/bin
mv bin/sbt-launch.jar $out/lib/
cp ${sbt} $out/bin/sbt
substituteInPlace $out/bin/sbt --replace @out@ $out
'';
}