diff --git a/pkgs/development/compilers/swift/default.nix b/pkgs/development/compilers/swift/default.nix
new file mode 100644
index 000000000000..da4482b463ec
--- /dev/null
+++ b/pkgs/development/compilers/swift/default.nix
@@ -0,0 +1,264 @@
+{ stdenv
+, cmake
+, coreutils
+, glibc
+, which
+, perl
+, libedit
+, ninja
+, pkgconfig
+, sqlite
+, swig
+, bash
+, libxml2
+, llvm
+, clang
+, python
+, ncurses
+, libuuid
+, libbsd
+, icu
+, autoconf
+, libtool
+, automake
+, libblocksruntime
+, curl
+, rsync
+, git
+, libgit2
+, binutils
+, fetchFromGitHub
+, paxctl
+, findutils
+#, systemtap
+}:
+
+let
+  v_major = "3.1";
+  version = "${v_major}-RELEASE";
+  version_friendly = "${v_major}";
+
+  tag = "refs/tags/swift-${version}";
+  fetch = { repo, sha256, fetchSubmodules ? false }:
+    fetchFromGitHub {
+      owner = "apple";
+      inherit repo sha256 fetchSubmodules;
+      rev = tag;
+      name = "${repo}-${version}-src";
+    };
+
+sources = {
+    # FYI: SourceKit probably would work but currently requires building everything twice
+    # For more inforation, see: https://github.com/apple/swift/pull/3594#issuecomment-234169759
+    clang = fetch {
+      repo = "swift-clang";
+      sha256 = "0820mx1ghfnk4p5595r1f313y1699jwi61zghfbwak5wgwgy7n4x";
+    };
+    llvm = fetch {
+      repo = "swift-llvm";
+      sha256 = "0zb1zi77b2xdz5szlz2m3j3d92dc0q00dv8py2s6iaq3k435i3sq";
+    };
+    compilerrt = fetch {
+      repo = "swift-compiler-rt";
+      sha256 = "1gjcr6g3ffs3nhf4a84iwg4flbd7rqcf9rvvclwyq96msa3mj950";
+    };
+    cmark = fetch {
+      repo = "swift-cmark";
+      sha256 = "0qf2f3zd8lndkfbxbz6vkznzz8rvq5gigijh7pgmfx9fi4zcssqx";
+    };
+    lldb = fetch {
+      repo = "swift-lldb";
+      sha256 = "17n4whpf3wxw9zaayiq21gk9q3547qxi4rvxld2hybh0k7a1bj5c";
+    };
+    llbuild = fetch {
+      repo = "swift-llbuild";
+      sha256 = "1l3hnb2s01jby91k1ipbc3bhszq14vyx5pzdhf2chld1yhpg420d";
+    };
+    pm = fetch {
+      repo = "swift-package-manager";
+      sha256 = "05zijald08z4jbppjawlc0h9n0i4dvn6jnhq0i5b9qq55l7a1lrk";
+    };
+    xctest = fetch {
+      repo = "swift-corelibs-xctest";
+      sha256 = "0cj5y7wanllfldag08ci567x12aw793c79afckpbsiaxmwy4xhnm";
+    };
+    foundation = fetch {
+      repo = "swift-corelibs-foundation";
+      sha256 = "0d34clr7n0kfy0l94hmgg1cailg3bml0qzlhy8wh75hrrv3n4g1v";
+    };
+    libdispatch = fetch {
+      repo = "swift-corelibs-libdispatch";
+      sha256 = "1rka7ijkdk4ybdvyk3map5mc1fm79v848v9nhpfq75m5i63r61bh";
+      fetchSubmodules = true;
+    };
+    swift = fetch {
+      repo = "swift";
+      sha256 = "172q84z70z9gpwahmlcifihldrvc3cafy9ajbz4wi5f6ncw7wbmb";
+    };
+  };
+
+  devInputs = [
+    curl
+    glibc
+    icu
+    libblocksruntime
+    libbsd
+    libedit
+    libuuid
+    libxml2
+    ncurses
+    sqlite
+    swig
+    #    systemtap?
+  ];
+
+  cmakeFlags = [
+    "-DGLIBC_INCLUDE_PATH=${stdenv.cc.libc.dev}/include"
+    "-DC_INCLUDE_DIRS=${stdenv.lib.makeSearchPathOutput "dev" "include" devInputs}:${libxml2.dev}/include/libxml2"
+    "-DGCC_INSTALL_PREFIX=${clang.cc.gcc}"
+  ];
+
+  builder = ''
+    $SWIFT_SOURCE_ROOT/swift/utils/build-script \
+      --preset=buildbot_linux \
+      installable_package=$INSTALLABLE_PACKAGE \
+      install_prefix=$out \
+      install_destdir=$SWIFT_INSTALL_DIR \
+      extra_cmake_options="${stdenv.lib.concatStringsSep "," cmakeFlags}"'';
+
+in
+stdenv.mkDerivation rec {
+  name = "swift-${version_friendly}";
+
+  buildInputs = devInputs ++ [
+    autoconf
+    automake
+    bash
+    clang
+    cmake
+    coreutils
+    libtool
+    ninja
+    perl
+    pkgconfig
+    python
+    rsync
+    which
+    findutils
+  ] ++ stdenv.lib.optional stdenv.needsPax paxctl;
+
+  # TODO: Revisit what's propagated and how
+  propagatedBuildInputs = [
+    libgit2
+    python
+  ];
+  propagatedUserEnvPkgs = [ git pkgconfig ];
+
+  hardeningDisable = [ "format" ]; # for LLDB
+
+  configurePhase = ''
+    cd ..
+    
+    export INSTALLABLE_PACKAGE=$PWD/swift.tar.gz
+
+    mkdir build install
+    export SWIFT_BUILD_ROOT=$PWD/build
+    export SWIFT_INSTALL_DIR=$PWD/install
+
+    cd $SWIFT_BUILD_ROOT
+
+    unset CC
+    unset CXX
+
+    export NIX_ENFORCE_PURITY=
+  '';
+
+  unpackPhase = ''
+    mkdir src
+    cd src
+    export sourceRoot=$PWD
+    export SWIFT_SOURCE_ROOT=$PWD
+
+    cp -r ${sources.clang} clang
+    cp -r ${sources.llvm} llvm
+    cp -r ${sources.compilerrt} compiler-rt
+    cp -r ${sources.cmark} cmark
+    cp -r ${sources.lldb} lldb
+    cp -r ${sources.llbuild} llbuild
+    cp -r ${sources.pm} swiftpm
+    cp -r ${sources.xctest} swift-corelibs-xctest
+    cp -r ${sources.foundation} swift-corelibs-foundation
+    cp -r ${sources.libdispatch} swift-corelibs-libdispatch
+    cp -r ${sources.swift} swift
+
+    chmod -R u+w .
+  '';
+
+  patchPhase = ''
+    # Just patch all the things for now, we can focus this later
+    patchShebangs $SWIFT_SOURCE_ROOT
+
+    substituteInPlace swift/stdlib/public/Platform/CMakeLists.txt \
+      --replace '/usr/include' "${stdenv.cc.libc.dev}/include"
+    substituteInPlace swift/utils/build-script-impl \
+      --replace '/usr/include/c++' "${clang.cc.gcc}/include/c++"
+  '' + stdenv.lib.optionalString stdenv.needsPax ''
+    patch -p1 -d swift -i ${./patches/build-script-pax.patch}
+  '' + ''
+    patch -p1 -d swift -i ${./patches/0001-build-presets-linux-don-t-require-using-Ninja.patch}
+    patch -p1 -d swift -i ${./patches/0002-build-presets-linux-allow-custom-install-prefix.patch}
+    patch -p1 -d swift -i ${./patches/0003-build-presets-linux-disable-tests.patch}
+    patch -p1 -d swift -i ${./patches/0004-build-presets-linux-plumb-extra-cmake-options.patch}
+
+    substituteInPlace clang/lib/Driver/ToolChains.cpp \
+      --replace '  addPathIfExists(D, SysRoot + "/usr/lib", Paths);' \
+                '  addPathIfExists(D, SysRoot + "/usr/lib", Paths); addPathIfExists(D, "${glibc}/lib", Paths);'
+    patch -p1 -d clang -i ${./purity.patch}
+
+    # Workaround hardcoded dep on "libcurses" (vs "libncurses"):
+    sed -i 's,curses,ncurses,' llbuild/*/*/CMakeLists.txt
+    substituteInPlace llbuild/tests/BuildSystem/Build/basic.llbuild \
+      --replace /usr/bin/env $(type -p env)
+
+    # This test fails on one of my machines, not sure why.
+    # Disabling for now. 
+    rm llbuild/tests/Examples/buildsystem-capi.llbuild
+
+    substituteInPlace swift-corelibs-foundation/lib/script.py \
+      --replace /bin/cp $(type -p cp)
+
+    PREFIX=''${out/#\/}
+    substituteInPlace swift-corelibs-xctest/build_script.py \
+      --replace usr "$PREFIX"
+    substituteInPlace swiftpm/Utilities/bootstrap \
+      --replace "usr" "$PREFIX"
+  '';
+
+  doCheck = false;
+
+  buildPhase = builder;
+
+  installPhase = ''
+    mkdir -p $out
+
+    # Extract the generated tarball into the store
+    PREFIX=''${out/#\/}
+    tar xf $INSTALLABLE_PACKAGE -C $out --strip-components=3 $PREFIX
+
+    paxmark pmr $out/bin/swift
+    paxmark pmr $out/bin/*
+
+    # TODO: Use wrappers to get these on the PATH for swift tools, instead
+    ln -s ${clang}/bin/* $out/bin/
+    ln -s ${binutils}/bin/ar $out/bin/ar
+  '';
+
+  meta = with stdenv.lib; {
+    description = "The Swift Programming Language";
+    homepage = "https://github.com/apple/swift";
+    maintainers = with maintainers; [ jb55 dtzWill ];
+    license = licenses.asl20;
+    platforms = platforms.linux;
+  };
+}
+
diff --git a/pkgs/development/compilers/swift/patches/0001-build-presets-linux-don-t-require-using-Ninja.patch b/pkgs/development/compilers/swift/patches/0001-build-presets-linux-don-t-require-using-Ninja.patch
new file mode 100644
index 000000000000..6ef83754a674
--- /dev/null
+++ b/pkgs/development/compilers/swift/patches/0001-build-presets-linux-don-t-require-using-Ninja.patch
@@ -0,0 +1,25 @@
+From 1fc49285c7a198de14005803dfde64bda17f4120 Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Tue, 28 Mar 2017 15:01:16 -0500
+Subject: [PATCH 1/4] build-presets: (linux) don't require using Ninja
+
+---
+ utils/build-presets.ini | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/utils/build-presets.ini b/utils/build-presets.ini
+index 7ee57ad2df..e6b0af3581 100644
+--- a/utils/build-presets.ini
++++ b/utils/build-presets.ini
+@@ -686,7 +686,7 @@ swiftpm
+ xctest
+ dash-dash
+ 
+-build-ninja
++# build-ninja
+ install-swift
+ install-lldb
+ install-llbuild
+-- 
+2.12.2
+
diff --git a/pkgs/development/compilers/swift/patches/0002-build-presets-linux-allow-custom-install-prefix.patch b/pkgs/development/compilers/swift/patches/0002-build-presets-linux-allow-custom-install-prefix.patch
new file mode 100644
index 000000000000..0e18e8812a84
--- /dev/null
+++ b/pkgs/development/compilers/swift/patches/0002-build-presets-linux-allow-custom-install-prefix.patch
@@ -0,0 +1,25 @@
+From fca6624b7a0ad670157105336a737cc95f9ce9fb Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Tue, 28 Mar 2017 15:01:40 -0500
+Subject: [PATCH 2/4] build-presets: (linux) allow custom install prefix
+
+---
+ utils/build-presets.ini | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/utils/build-presets.ini b/utils/build-presets.ini
+index e6b0af3581..1095cbaab7 100644
+--- a/utils/build-presets.ini
++++ b/utils/build-presets.ini
+@@ -692,7 +692,7 @@ install-lldb
+ install-llbuild
+ install-swiftpm
+ install-xctest
+-install-prefix=/usr
++install-prefix=%(install_prefix)s
+ swift-install-components=autolink-driver;compiler;clang-builtin-headers;stdlib;swift-remote-mirror;sdk-overlay;license
+ build-swift-static-stdlib
+ build-swift-static-sdk-overlay
+-- 
+2.12.2
+
diff --git a/pkgs/development/compilers/swift/patches/0003-build-presets-linux-disable-tests.patch b/pkgs/development/compilers/swift/patches/0003-build-presets-linux-disable-tests.patch
new file mode 100644
index 000000000000..f647d9189dd2
--- /dev/null
+++ b/pkgs/development/compilers/swift/patches/0003-build-presets-linux-disable-tests.patch
@@ -0,0 +1,38 @@
+From fcc7c216da6cd255f884b7aa39f361786e3afa6a Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Tue, 28 Mar 2017 15:02:18 -0500
+Subject: [PATCH 3/4] build-presets: (linux) disable tests.
+
+---
+ utils/build-presets.ini | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/utils/build-presets.ini b/utils/build-presets.ini
+index 1095cbaab7..1739e91dc2 100644
+--- a/utils/build-presets.ini
++++ b/utils/build-presets.ini
+@@ -700,7 +700,7 @@ build-swift-stdlib-unittest-extra
+ 
+ # Executes the lit tests for the installable package that is created
+ # Assumes the swift-integration-tests repo is checked out
+-test-installable-package
++# test-installable-package
+ 
+ # Path to the root of the installation filesystem.
+ install-destdir=%(install_destdir)s
+@@ -713,9 +713,9 @@ mixin-preset=mixin_linux_installation
+ build-subdir=buildbot_linux
+ lldb
+ release
+-test
+-validation-test
+-long-test
++#test
++#validation-test
++#long-test
+ foundation
+ libdispatch
+ lit-args=-v
+-- 
+2.12.2
+
diff --git a/pkgs/development/compilers/swift/patches/0004-build-presets-linux-plumb-extra-cmake-options.patch b/pkgs/development/compilers/swift/patches/0004-build-presets-linux-plumb-extra-cmake-options.patch
new file mode 100644
index 000000000000..5493196303cd
--- /dev/null
+++ b/pkgs/development/compilers/swift/patches/0004-build-presets-linux-plumb-extra-cmake-options.patch
@@ -0,0 +1,25 @@
+From 4a46b12f580d0a9779937d07c4f1fd347570c4ef Mon Sep 17 00:00:00 2001
+From: Will Dietz <w@wdtz.org>
+Date: Tue, 28 Mar 2017 15:02:37 -0500
+Subject: [PATCH 4/4] build-presets: (linux) plumb extra-cmake-options
+
+---
+ utils/build-presets.ini | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/utils/build-presets.ini b/utils/build-presets.ini
+index 1739e91dc2..0608fed9c1 100644
+--- a/utils/build-presets.ini
++++ b/utils/build-presets.ini
+@@ -708,6 +708,8 @@ install-destdir=%(install_destdir)s
+ # Path to the .tar.gz package we would create.
+ installable-package=%(installable_package)s
+ 
++extra-cmake-options=%(extra_cmake_options)s
++
+ [preset: buildbot_linux]
+ mixin-preset=mixin_linux_installation
+ build-subdir=buildbot_linux
+-- 
+2.12.2
+
diff --git a/pkgs/development/compilers/swift/patches/build-script-pax.patch b/pkgs/development/compilers/swift/patches/build-script-pax.patch
new file mode 100644
index 000000000000..9f1976a2d88d
--- /dev/null
+++ b/pkgs/development/compilers/swift/patches/build-script-pax.patch
@@ -0,0 +1,32 @@
+--- swift/utils/build-script-impl	2017-01-23 12:47:20.401326309 -0600
++++ swift-pax/utils/build-script-impl	2017-01-23 13:24:10.339366996 -0600
+@@ -1823,6 +1823,16 @@ function set_lldb_xcodebuild_options() {
+     fi
+ }
+ 
++## XXX: Taken from nixpkgs /pkgs/stdenv/generic/setup.sh
++isELF() {
++    local fn="$1"
++    local magic
++    exec {fd}< "$fn"
++    read -n 4 -u $fd magic
++    exec {fd}<&-
++    if [[ "$magic" =~ ELF ]]; then return 0; else return 1; fi
++}
++
+ #
+ # Configure and build each product
+ #
+@@ -2624,6 +2634,12 @@ for host in "${ALL_HOSTS[@]}"; do
+             fi
+ 
+             call "${CMAKE_BUILD[@]}" "${build_dir}" $(cmake_config_opt ${product}) -- "${BUILD_ARGS[@]}" ${build_targets[@]}
++            
++						while IFS= read -r -d $'\0' i; do
++								if ! isELF "$i"; then continue; fi
++								echo "setting pax flags on $i"
++								paxctl -czexm "$i" || true
++						done < <(find "${build_dir}" -executable -type f -wholename "*/bin/*" -print0)
+         fi
+     done
+ done
diff --git a/pkgs/development/compilers/swift/purity.patch b/pkgs/development/compilers/swift/purity.patch
new file mode 100644
index 000000000000..f5fb4c73af47
--- /dev/null
+++ b/pkgs/development/compilers/swift/purity.patch
@@ -0,0 +1,16 @@
+--- a/lib/Driver/Tools.cpp	2016-08-25 15:48:05.187553443 +0200
++++ b/lib/Driver/Tools.cpp	2016-08-25 15:48:47.534468882 +0200
+@@ -9420,13 +9420,6 @@
+   if (!Args.hasArg(options::OPT_static)) {
+     if (Args.hasArg(options::OPT_rdynamic))
+       CmdArgs.push_back("-export-dynamic");
+-
+-    if (!Args.hasArg(options::OPT_shared)) {
+-      const std::string Loader =
+-          D.DyldPrefix + ToolChain.getDynamicLinker(Args);
+-      CmdArgs.push_back("-dynamic-linker");
+-      CmdArgs.push_back(Args.MakeArgString(Loader));
+-    }
+   }
+ 
+   CmdArgs.push_back("-o");
diff --git a/pkgs/development/libraries/libblocksruntime/default.nix b/pkgs/development/libraries/libblocksruntime/default.nix
new file mode 100644
index 000000000000..34ab70e0adcd
--- /dev/null
+++ b/pkgs/development/libraries/libblocksruntime/default.nix
@@ -0,0 +1,27 @@
+{ stdenv, fetchFromGitHub, clang }:
+
+stdenv.mkDerivation {
+  name = "blocksruntime";
+
+  src = fetchFromGitHub {
+    owner = "mackyle";
+    repo = "blocksruntime";
+    rev = "b5c5274daf1e0e46ecc9ad8f6f69889bce0a0a5d";
+    sha256 = "0ic4lagagkylcvwgf10mg0s1i57h4i25ds2fzvms22xj4zwzk1sd";
+  };
+
+  buildInputs = [ clang ];
+
+  configurePhase = ''
+    export CC=clang
+    export CXX=clang++
+  '';
+
+  buildPhase = "./buildlib";
+
+  checkPhase = "./checktests";
+
+  doCheck = false; # hasdescriptor.c test fails, hrm.
+
+  installPhase = ''prefix="/" DESTDIR=$out ./installlib'';
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 93c6b2b82914..61ff664d446d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5622,6 +5622,8 @@ with pkgs;
 
   metaBuildEnv = callPackage ../development/compilers/meta-environment/meta-build-env { };
 
+  swift = callPackage ../development/compilers/swift { };
+
   swiProlog = callPackage ../development/compilers/swi-prolog { };
 
   tbb = callPackage ../development/libraries/tbb { };
@@ -8083,6 +8085,8 @@ with pkgs;
 
   libbdplus = callPackage ../development/libraries/libbdplus { };
 
+  libblocksruntime = callPackage ../development/libraries/libblocksruntime { };
+
   libbluray = callPackage ../development/libraries/libbluray { };
 
   libbs2b = callPackage ../development/libraries/audio/libbs2b { };