diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index 942a2158b15f..063b9bf6c7af 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -37,7 +37,7 @@ rec {
   # `driver' is the script that runs the network.
   runTests = driver:
     stdenv.mkDerivation {
-      name = "vm-test-run";
+      name = "vm-test-run-${driver.testName}";
 
       requiredSystemFeatures = [ "kvm" "nixos-test" ];
 
@@ -68,9 +68,10 @@ rec {
 
 
   makeTest =
-    { testScript, makeCoverageReport ? false, ... } @ t:
+    { testScript, makeCoverageReport ? false, name ? "unnamed", ... } @ t:
 
     let
+      testDriverName = "nixos-test-driver-${name}";
 
       nodes = buildVirtualNetwork (
         t.nodes or (if t ? machine then { machine = t.machine; } else { }));
@@ -88,10 +89,11 @@ rec {
       # Generate onvenience wrappers for running the test driver
       # interactively with the specified network, and for starting the
       # VMs from the command line.
-      driver = runCommand "nixos-test-driver"
+      driver = runCommand testDriverName
         { buildInputs = [ makeWrapper];
           testScript = testScript';
           preferLocalBuild = true;
+          testName = name;
         }
         ''
           mkdir -p $out/bin
diff --git a/nixos/tests/avahi.nix b/nixos/tests/avahi.nix
index b6f18087c56f..3898ddb4e8e6 100644
--- a/nixos/tests/avahi.nix
+++ b/nixos/tests/avahi.nix
@@ -1,6 +1,7 @@
 # Test whether `avahi-daemon' and `libnss-mdns' work as expected.
 
 import ./make-test.nix {
+  name = "avahi";
 
   nodes = {
     one =
diff --git a/nixos/tests/bittorrent.nix b/nixos/tests/bittorrent.nix
index b58657a5ecdb..002e012f65f0 100644
--- a/nixos/tests/bittorrent.nix
+++ b/nixos/tests/bittorrent.nix
@@ -23,6 +23,7 @@ let
 in
 
 {
+  name = "bittorrent";
 
   nodes =
     { tracker =
diff --git a/nixos/tests/check-filesystems.nix b/nixos/tests/check-filesystems.nix
index 09401f9a3f44..71aa9649840f 100644
--- a/nixos/tests/check-filesystems.nix
+++ b/nixos/tests/check-filesystems.nix
@@ -6,6 +6,8 @@
 with import ../lib/build-vms.nix { inherit nixos nixpkgs system; };
 
 rec {
+  name = "check-filesystems";
+
   nodes = {
     share = {pkgs, config, ...}: {
       services.nfs.server.enable = true;
diff --git a/nixos/tests/containers.nix b/nixos/tests/containers.nix
index 8ad9cd6e0d79..f7dc8eb491d6 100644
--- a/nixos/tests/containers.nix
+++ b/nixos/tests/containers.nix
@@ -1,6 +1,7 @@
 # Test for NixOS' container support.
 
 import ./make-test.nix {
+  name = "containers";
 
   machine =
     { config, pkgs, ... }:
diff --git a/nixos/tests/firefox.nix b/nixos/tests/firefox.nix
index b42d473b8025..77a6f6ac9e71 100644
--- a/nixos/tests/firefox.nix
+++ b/nixos/tests/firefox.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix ({ pkgs, ... }: {
+  name = "firefox";
 
   machine =
     { config, pkgs, ... }:
diff --git a/nixos/tests/firewall.nix b/nixos/tests/firewall.nix
index d10e10b1d91c..16922508c7c5 100644
--- a/nixos/tests/firewall.nix
+++ b/nixos/tests/firewall.nix
@@ -1,6 +1,7 @@
 # Test the firewall module.
 
 import ./make-test.nix {
+  name = "firewall";
 
   nodes =
     { walled =
diff --git a/nixos/tests/gnome3.nix b/nixos/tests/gnome3.nix
index f1a6ce633313..44668f57fc1e 100644
--- a/nixos/tests/gnome3.nix
+++ b/nixos/tests/gnome3.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix {
+  name = "gnome3";
 
   machine =
     { config, pkgs, ... }:
diff --git a/nixos/tests/gnome3_12.nix b/nixos/tests/gnome3_12.nix
index 92a1919b8cb2..439674b69d5d 100644
--- a/nixos/tests/gnome3_12.nix
+++ b/nixos/tests/gnome3_12.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix {
+  name = "gnome3_12";
 
   machine =
     { config, pkgs, ... }:
diff --git a/nixos/tests/influxdb.nix b/nixos/tests/influxdb.nix
index 278b264170fa..9f8ea061b960 100644
--- a/nixos/tests/influxdb.nix
+++ b/nixos/tests/influxdb.nix
@@ -1,6 +1,8 @@
 # This test runs influxdb and checks if influxdb is up and running
 
 import ./make-test.nix {
+  name = "influxdb";
+
   nodes = {
     one = { config, pkgs, ... }: {
       services.influxdb.enable = true;
diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index 98e8142a0dfd..1cd1aa63a55b 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -215,10 +215,11 @@ let
     '';
 
 
-  makeInstallerTest =
+  makeInstallerTest = name:
     { createPartitions, testChannel ? false, useEFI ? false, grubVersion ? 2, grubDevice ? "/dev/vda" }:
     makeTest {
       inherit iso;
+      name = "installer-" + name;
       nodes = if testChannel then { inherit webserver; } else { };
       testScript = testScriptFun {
         inherit createPartitions testChannel useEFI grubVersion grubDevice;
@@ -233,7 +234,7 @@ in {
 
   # The (almost) simplest partitioning scheme: a swap partition and
   # one big filesystem partition.
-  simple = makeInstallerTest
+  simple = makeInstallerTest "simple"
     { createPartitions =
         ''
           $machine->succeed(
@@ -251,7 +252,7 @@ in {
     };
 
   # Same as the previous, but now with a separate /boot partition.
-  separateBoot = makeInstallerTest
+  separateBoot = makeInstallerTest "separateBoot"
     { createPartitions =
         ''
           $machine->succeed(
@@ -273,7 +274,7 @@ in {
 
   # Create two physical LVM partitions combined into one volume group
   # that contains the logical swap and root partitions.
-  lvm = makeInstallerTest
+  lvm = makeInstallerTest "lvm"
     { createPartitions =
         ''
           $machine->succeed(
@@ -295,7 +296,7 @@ in {
         '';
     };
 
-  swraid = makeInstallerTest
+  swraid = makeInstallerTest "swraid"
     { createPartitions =
         ''
           $machine->succeed(
@@ -328,7 +329,7 @@ in {
     };
 
   # Test a basic install using GRUB 1.
-  grub1 = makeInstallerTest
+  grub1 = makeInstallerTest "grub1"
     { createPartitions =
         ''
           $machine->succeed(
@@ -348,7 +349,7 @@ in {
     };
 
   # Test an EFI install.
-  efi = makeInstallerTest
+  efi = makeInstallerTest "efi"
     { createPartitions =
         ''
           $machine->succeed(
@@ -369,6 +370,7 @@ in {
   # Rebuild the CD configuration with a little modification.
   rebuildCD = makeTest
     { inherit iso;
+      name = "rebuild-CD";
       nodes = { };
       testScript =
         ''
diff --git a/nixos/tests/ipv6.nix b/nixos/tests/ipv6.nix
index eb15363d3c32..af6fec6bfbf5 100644
--- a/nixos/tests/ipv6.nix
+++ b/nixos/tests/ipv6.nix
@@ -2,6 +2,7 @@
 # solicication/advertisement using radvd works.
 
 import ./make-test.nix {
+  name = "ipv6";
 
   nodes =
     { client = { config, pkgs, ... }: { };
diff --git a/nixos/tests/jenkins.nix b/nixos/tests/jenkins.nix
index ad7ea78ac49b..28027c294bc6 100644
--- a/nixos/tests/jenkins.nix
+++ b/nixos/tests/jenkins.nix
@@ -4,6 +4,7 @@
 #   3. jenkins service not started on slave node
 
 import ./make-test.nix {
+  name = "jenkins";
 
   nodes = {
 
diff --git a/nixos/tests/kde4.nix b/nixos/tests/kde4.nix
index 99a82a6b95df..90c37397821e 100644
--- a/nixos/tests/kde4.nix
+++ b/nixos/tests/kde4.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix ({ pkgs, ... }: {
+  name = "kde4";
 
   machine =
     { config, pkgs, ... }:
diff --git a/nixos/tests/kexec.nix b/nixos/tests/kexec.nix
index b09287682c01..0f0565a60e95 100644
--- a/nixos/tests/kexec.nix
+++ b/nixos/tests/kexec.nix
@@ -1,6 +1,7 @@
 # Test whether fast reboots via kexec work.
 
 import ./make-test.nix  {
+  name = "kexec";
 
   machine = { config, pkgs, ... }:
     { virtualisation.vlans = [ ]; };
diff --git a/nixos/tests/login.nix b/nixos/tests/login.nix
index 44c53c231c81..e8373219ca68 100644
--- a/nixos/tests/login.nix
+++ b/nixos/tests/login.nix
@@ -1,6 +1,7 @@
 import ./make-test.nix ({ pkgs, latestKernel ? false, ... }:
 
 {
+  name = "login";
 
   machine =
     { config, pkgs, lib, ... }:
diff --git a/nixos/tests/logstash.nix b/nixos/tests/logstash.nix
index e6aba7a10126..7284cde7a33c 100644
--- a/nixos/tests/logstash.nix
+++ b/nixos/tests/logstash.nix
@@ -2,6 +2,7 @@
 # elasticsearch is started.
 
 import ./make-test.nix {
+  name = "logstash";
 
   nodes = {
     one =
diff --git a/nixos/tests/misc.nix b/nixos/tests/misc.nix
index 8caef146ec87..c03db6c43353 100644
--- a/nixos/tests/misc.nix
+++ b/nixos/tests/misc.nix
@@ -1,6 +1,7 @@
 # Miscellaneous small tests that don't warrant their own VM run.
 
 import ./make-test.nix {
+  name = "misc";
 
   machine =
     { config, lib, pkgs, ... }:
diff --git a/nixos/tests/mpich.nix b/nixos/tests/mpich.nix
index 13cd0960d07c..a4ef7b624267 100644
--- a/nixos/tests/mpich.nix
+++ b/nixos/tests/mpich.nix
@@ -1,6 +1,8 @@
 # Simple example to showcase distributed tests using NixOS VMs.
 
 import ./make-test.nix {
+  name = "mpich";
+
   nodes = {
     master =
       { config, pkgs, ... }: {
diff --git a/nixos/tests/mumble.nix b/nixos/tests/mumble.nix
index 68ab8b642b01..32aae9161399 100644
--- a/nixos/tests/mumble.nix
+++ b/nixos/tests/mumble.nix
@@ -7,6 +7,8 @@ let
   };
 in
 {
+  name = "mumble";
+
   nodes = {
     server = { config, pkgs, ... }: {
       services.murmur.enable       = true;
diff --git a/nixos/tests/munin.nix b/nixos/tests/munin.nix
index acc4b949ab57..31676c10df1b 100644
--- a/nixos/tests/munin.nix
+++ b/nixos/tests/munin.nix
@@ -2,6 +2,7 @@
 # machine.
 
 import ./make-test.nix {
+  name = "munin";
 
   nodes = {
     one =
diff --git a/nixos/tests/mysql-replication.nix b/nixos/tests/mysql-replication.nix
index 7d0cf6d85a1a..5786fdbc58cd 100644
--- a/nixos/tests/mysql-replication.nix
+++ b/nixos/tests/mysql-replication.nix
@@ -6,6 +6,8 @@ let
 in
 
 {
+  name = "mysql-replication";
+
   nodes = {
     master =
       { pkgs, config, ... }:
diff --git a/nixos/tests/mysql.nix b/nixos/tests/mysql.nix
index 566d03baf367..0a753b9b625b 100644
--- a/nixos/tests/mysql.nix
+++ b/nixos/tests/mysql.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix {
+  name = "mysql";
 
   nodes = {
     master =
diff --git a/nixos/tests/nat.nix b/nixos/tests/nat.nix
index 02981469e106..5fdcc0e97ca9 100644
--- a/nixos/tests/nat.nix
+++ b/nixos/tests/nat.nix
@@ -5,6 +5,7 @@
 # for the client.
 
 import ./make-test.nix {
+  name = "nat";
 
   nodes =
     { client =
diff --git a/nixos/tests/nfs.nix b/nixos/tests/nfs.nix
index 864d05626b67..61b2431c04c7 100644
--- a/nixos/tests/nfs.nix
+++ b/nixos/tests/nfs.nix
@@ -17,6 +17,7 @@ let
 in
 
 {
+  name = "nfs";
 
   nodes =
     { client1 = client;
diff --git a/nixos/tests/openssh.nix b/nixos/tests/openssh.nix
index d4ce95e49f70..692618c5a84d 100644
--- a/nixos/tests/openssh.nix
+++ b/nixos/tests/openssh.nix
@@ -16,6 +16,7 @@ let
   ];
 
 in {
+  name = "openssh";
 
   nodes = {
 
diff --git a/nixos/tests/partition.nix b/nixos/tests/partition.nix
index 120ecaad8812..72fd37e041e5 100644
--- a/nixos/tests/partition.nix
+++ b/nixos/tests/partition.nix
@@ -63,6 +63,8 @@ let
     logvol / --size=1000 --grow --fstype=ext4 --name=root --vgname=nixos
   '';
 in {
+  name = "partitiion";
+
   machine = { config, pkgs, ... }: {
     environment.systemPackages = [
       pkgs.pythonPackages.nixpart
diff --git a/nixos/tests/phabricator.nix b/nixos/tests/phabricator.nix
index 8a8c6cb784cc..53038474c91a 100644
--- a/nixos/tests/phabricator.nix
+++ b/nixos/tests/phabricator.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix ({ pkgs, ... }: {
+  name = "phabricator";
 
   nodes = {
     storage =
diff --git a/nixos/tests/printing.nix b/nixos/tests/printing.nix
index 16f9812d93b5..a55e077c2696 100644
--- a/nixos/tests/printing.nix
+++ b/nixos/tests/printing.nix
@@ -1,6 +1,7 @@
 # Test printing via CUPS.
 
 import ./make-test.nix ({pkgs, ... }: {
+  name = "printing";
 
   nodes = {
 
diff --git a/nixos/tests/proxy.nix b/nixos/tests/proxy.nix
index 88dbdb2720fb..01f0f3fe17a3 100644
--- a/nixos/tests/proxy.nix
+++ b/nixos/tests/proxy.nix
@@ -14,6 +14,7 @@ let
 in
 
 {
+  name = "proxy";
 
   nodes =
     { proxy =
diff --git a/nixos/tests/quake3.nix b/nixos/tests/quake3.nix
index 3ff12fd57c06..b16cb179982a 100644
--- a/nixos/tests/quake3.nix
+++ b/nixos/tests/quake3.nix
@@ -13,6 +13,7 @@ let
 in
 
 rec {
+  name = "quake3";
 
   makeCoverageReport = true;
 
diff --git a/nixos/tests/rabbitmq.nix b/nixos/tests/rabbitmq.nix
index ffcdde9d87f2..3ef3f92764c9 100644
--- a/nixos/tests/rabbitmq.nix
+++ b/nixos/tests/rabbitmq.nix
@@ -1,6 +1,7 @@
 # This test runs rabbitmq and checks if rabbitmq is up and running.
 
 import ./make-test.nix ({ pkgs, ... }: {
+  name = "rabbitmq";
 
   nodes = {
     one = { config, pkgs, ... }: {
diff --git a/nixos/tests/simple.nix b/nixos/tests/simple.nix
index e21b919cdf80..62d748d64296 100644
--- a/nixos/tests/simple.nix
+++ b/nixos/tests/simple.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix {
+  name = "simple"
 
   machine = { config, pkgs, ... }: { };
 
diff --git a/nixos/tests/subversion.nix b/nixos/tests/subversion.nix
index e6746dc08287..50277edbdd89 100644
--- a/nixos/tests/subversion.nix
+++ b/nixos/tests/subversion.nix
@@ -32,6 +32,7 @@ let
 in
 
 {
+  name = "subversion";
 
   nodes =
     { webserver =
diff --git a/nixos/tests/tomcat.nix b/nixos/tests/tomcat.nix
index 3b0b1bb79117..f3ee3477b5ac 100644
--- a/nixos/tests/tomcat.nix
+++ b/nixos/tests/tomcat.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix {
+  name = "tomcat";
 
   nodes = {
     server =
diff --git a/nixos/tests/trac.nix b/nixos/tests/trac.nix
index 3f17dafaca15..87a2d328b4a6 100644
--- a/nixos/tests/trac.nix
+++ b/nixos/tests/trac.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix ({ pkgs, ... }: {
+  name = "trac";
 
   nodes = {
     storage =
diff --git a/nixos/tests/udisks2.nix b/nixos/tests/udisks2.nix
index e0c57d7c34d6..1d2f79e4f6c1 100644
--- a/nixos/tests/udisks2.nix
+++ b/nixos/tests/udisks2.nix
@@ -10,6 +10,7 @@ let
 in
 
 {
+  name = "udisks2";
 
   machine =
     { config, pkgs, ... }:
diff --git a/nixos/tests/xfce.nix b/nixos/tests/xfce.nix
index ded37943e51d..ced0c6b9826b 100644
--- a/nixos/tests/xfce.nix
+++ b/nixos/tests/xfce.nix
@@ -1,4 +1,5 @@
 import ./make-test.nix {
+  name = "xfce";
 
   machine =
     { config, pkgs, ... }:
diff --git a/pkgs/applications/version-management/git-and-tools/default.nix b/pkgs/applications/version-management/git-and-tools/default.nix
index 482866969a11..fd548296220e 100644
--- a/pkgs/applications/version-management/git-and-tools/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/default.nix
@@ -95,4 +95,7 @@ rec {
   darcsToGit = callPackage ./darcs-to-git { };
 
   gitflow = callPackage ./gitflow { };
+
+  git-remote-hg = callPackage ./git-remote-hg { };
+
 }
diff --git a/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
new file mode 100644
index 000000000000..ffeb299f49b5
--- /dev/null
+++ b/pkgs/applications/version-management/git-and-tools/git-remote-hg/default.nix
@@ -0,0 +1,35 @@
+{ stdenv, fetchgit, mercurial, makeWrapper,
+  asciidoc, xmlto, dbus, docbook_xsl, docbook_xml_dtd_45, libxslt, libxml2
+}:
+
+stdenv.mkDerivation rec {
+  rev = "185852eac44c25ae2e8d3b3fb6c9630e754e6363";
+  version = "v0.2-185852eac44c25ae2e8d3b3fb6c9630e754e6363";
+  name = "git-remote-hg-${version}";
+
+  src = fetchgit {
+    inherit rev;
+    url = "git://github.com/felipec/git-remote-hg.git";
+    sha256 = "1hc65nvxq7if1imwffyxia0i6vnkbax09gfcl9vq9yffzi8xzzfy";
+  };
+
+  buildInputs = [ mercurial.python mercurial makeWrapper
+    asciidoc xmlto dbus docbook_xsl docbook_xml_dtd_45 libxslt libxml2
+  ];
+
+  doCheck = false;
+
+  installFlags = "HOME=\${out}";
+
+  postInstall = ''
+    wrapProgram $out/bin/git-remote-hg \
+      --prefix PYTHONPATH : "$(echo ${mercurial}/lib/python*/site-packages):$(echo ${mercurial.python}/lib/python*/site-packages)${stdenv.lib.concatMapStrings (x: ":$(echo ${x}/lib/python*/site-packages)") mercurial.pythonPackages}"
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = "https://github.com/felipec/git-remote-hg";
+    description = "semi-official Mercurial bridge from Git project, once installed, it allows you to clone, fetch and push to and from Mercurial repositories as if they were Git ones";
+    license = licenses.gpl2;
+    maintainers = [ maintainers.garbas ];
+  };
+}
diff --git a/pkgs/development/libraries/gperftools/default.nix b/pkgs/development/libraries/gperftools/default.nix
index c7c639f2adb8..9ffccac1e0f4 100644
--- a/pkgs/development/libraries/gperftools/default.nix
+++ b/pkgs/development/libraries/gperftools/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "0ks9gsnhxrs2vccc6ha9m8xmj83lmw09xcws4zc0k57q4jcy5bgk";
   };
 
-  buildInputs = [ libunwind ];
+  buildInputs = stdenv.lib.optional stdenv.isLinux libunwind;
 
   # some packages want to link to the static tcmalloc_minimal
   # to drop the runtime dependency on gperftools
@@ -19,6 +19,6 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = https://code.google.com/p/gperftools/;
     description = "Fast, multi-threaded malloc() and nifty performance analysis tools";
-    platforms = stdenv.lib.platforms.linux;
+    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
   };
 }
diff --git a/pkgs/development/libraries/nix-plugins/default.nix b/pkgs/development/libraries/nix-plugins/default.nix
new file mode 100644
index 000000000000..3b4f7da94f3d
--- /dev/null
+++ b/pkgs/development/libraries/nix-plugins/default.nix
@@ -0,0 +1,25 @@
+{ stdenv, fetchgit, nix }:
+
+stdenv.mkDerivation {
+  name = "nix-plugins-1.0.0";
+
+  src = fetchgit {
+    url = git://github.com/shlevy/nix-plugins.git;
+    rev = "refs/tags/1.0.0";
+    sha256 = "e624de55cabc9014e77f21978d657089ae94ce161584b3d9dc3c9763658421b3";
+  };
+
+  buildInputs = [ nix ];
+
+  buildFlags = [ "NIX_INCLUDE=${nix}/include" ];
+
+  installFlags = [ "PREFIX=$(out)" ];
+
+  meta = {
+    description = "Collection of miscellaneous plugins for the nix expression language";
+    homepage = https://github.com/shlevy/nix-plugins;
+    license = stdenv.lib.licenses.mit;
+    maintaners = [ stdenv.lib.maintainers.shlevy ];
+    platforms = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/tools/package-management/nix/unstable.nix b/pkgs/tools/package-management/nix/unstable.nix
index f61b9eb818ae..b81ab7cad424 100644
--- a/pkgs/tools/package-management/nix/unstable.nix
+++ b/pkgs/tools/package-management/nix/unstable.nix
@@ -14,7 +14,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ perl pkgconfig ];
 
-  buildInputs = [ curl openssl boehmgc sqlite ];
+  buildInputs = [ curl openssl sqlite ];
+
+  propagatedBuildInputs = [ boehmgc ];
 
   # Note: bzip2 is not passed as a build input, because the unpack phase
   # would end up using the wrong bzip2 when cross-compiling.
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 89a1a5bad980..3354569488b9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5708,6 +5708,10 @@ let
 
   newt = callPackage ../development/libraries/newt { };
 
+  nix-plugins = callPackage ../development/libraries/nix-plugins {
+    nix = pkgs.nixUnstable;
+  };
+
   nspr = callPackage ../development/libraries/nspr { };
 
   nss = lowPrio (callPackage ../development/libraries/nss { });