diff --git a/pkgs/applications/version-management/subversion/default.nix b/pkgs/applications/version-management/subversion/default.nix
index 9d0f76e0d84..08169a0b039 100644
--- a/pkgs/applications/version-management/subversion/default.nix
+++ b/pkgs/applications/version-management/subversion/default.nix
@@ -19,13 +19,13 @@ assert compressionSupport -> neon.compressionSupport;
 
 stdenv.mkDerivation rec {
 
-  version = "1.6.6";
+  version = "1.6.9";
 
   name = "subversion-${version}";
 
   src = fetchurl {
     url = "http://subversion.tigris.org/downloads/${name}.tar.bz2";
-    sha256 = "14iw9hla3jas4ikd3wkfi7i4p4hic76x2bynic2339ny8yic28zy";
+    sha1 = "477aa89e60de7974ac0aa921cc369b4c2907693c";
   };
 
   buildInputs = [zlib apr aprutil sqlite]
diff --git a/pkgs/development/libraries/librsync/default.nix b/pkgs/development/libraries/librsync/default.nix
new file mode 100644
index 00000000000..09128e4c1c8
--- /dev/null
+++ b/pkgs/development/libraries/librsync/default.nix
@@ -0,0 +1,20 @@
+{stdenv, fetchurl}:
+
+stdenv.mkDerivation {
+  name = "librsync-0.9.7";
+  
+  src = fetchurl {
+    url = mirror://sourceforge/librsync/librsync-0.9.7.tar.gz;
+    sha256 = "1mj1pj99mgf1a59q9f2mxjli2fzxpnf55233pc1klxk2arhf8cv6";
+  };
+
+  # To allow x86_64 linking to the static lib to make a shared object
+  # like for the package 'duplicity'
+  CFLAGS="-fPIC";
+
+  meta = {
+    homepage = http://librsync.sourceforge.net/;
+    license = "LGPLv2+";
+    description = "Implementation of the rsync remote-delta algorithm";
+  };
+}
diff --git a/pkgs/development/libraries/sqlite/default.nix b/pkgs/development/libraries/sqlite/default.nix
index c869ac7daba..3e9d2804ced 100644
--- a/pkgs/development/libraries/sqlite/default.nix
+++ b/pkgs/development/libraries/sqlite/default.nix
@@ -1,6 +1,8 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, readline ? null, ncurses ? null }:
 
-stdenv.mkDerivation rec {
+assert readline != null -> ncurses != null;
+
+stdenv.mkDerivation {
   name = "sqlite-3.6.22";
 
   src = fetchurl {
@@ -8,9 +10,11 @@ stdenv.mkDerivation rec {
     sha256 = "1k5qyl0v2y4fpkh7vvxvb0irpnl71g0ffhfc3ksm40mrhcdq9qk8";
   };
 
+  buildInputs = [readline ncurses];
   configureFlags = "--enable-threadsafe";
 
   NIX_CFLAGS_COMPILE = "-DSQLITE_ENABLE_COLUMN_METADATA=1";
+  NIX_CFLAGS_LINK = if readline != null then "-lncurses" else "";
 
   meta = {
     homepage = http://www.sqlite.org/;
diff --git a/pkgs/os-specific/linux/dmtcp/default.nix b/pkgs/os-specific/linux/dmtcp/default.nix
new file mode 100644
index 00000000000..5c786f6172c
--- /dev/null
+++ b/pkgs/os-specific/linux/dmtcp/default.nix
@@ -0,0 +1,45 @@
+{stdenv, fetchurl, perl, python}:
+
+# Perl and python are needed in order to run the test suite.
+
+let
+  pname = "dmtcp";
+  version = "1.1.3";
+in
+
+stdenv.mkDerivation {
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/${pname}/${pname}_${version}.tar.gz";
+    sha256 = "0lx455hvxqa9rj83nms9mi6v5klswsrgj8hxhidhi9i2qkx88158";
+  };
+
+  buildInputs = [ perl python ];
+
+  doCheck = true;
+
+  preCheck = ''
+    substituteInPlace dmtcp/src/dmtcp_coordinator.cpp \
+      --replace /bin/bash /bin/sh
+    substituteInPlace utils/gdb-add-symbol-file \
+      --replace /bin/bash /bin/sh
+    substituteInPlace test/autotest.py \
+      --replace /usr/bin/env $(type -p env) \
+      --replace /bin/bash $(type -p bash) \
+      --replace /usr/bin/perl $(type -p perl) \
+      --replace /usr/bin/python $(type -p python)
+  '';
+
+  meta = {
+    description = "Distributed MultiThreaded Checkpointing";
+    longDescription = ''
+      DMTCP (Distributed MultiThreaded Checkpointing) is a tool to
+      transparently checkpointing the state of an arbitrary group of
+      programs spread across many machines and connected by sockets. It does
+      not modify the user's program or the operating system.
+    '';
+    homepage = http://dmtcp.sourceforge.net/;
+    license = "LGPL";
+  };
+}
diff --git a/pkgs/tools/backup/duplicity/default.nix b/pkgs/tools/backup/duplicity/default.nix
new file mode 100644
index 00000000000..61a1ec4baf2
--- /dev/null
+++ b/pkgs/tools/backup/duplicity/default.nix
@@ -0,0 +1,24 @@
+{stdenv, fetchurl, python, librsync, makeWrapper}:
+stdenv.mkDerivation {
+  name = "duplicity-0.6.06";
+
+  src = fetchurl {
+    url = http://code.launchpad.net/duplicity/0.6-series/0.6.06/+download/duplicity-0.6.06.tar.gz;
+    sha256 = "1g284y24061krigs386x5s7vs7cnwhah7g1mfk9jfn3gzsidv70g";
+  };
+
+  installPhase = ''
+    python setup.py install --prefix=$out
+    wrapProgram $out/bin/duplicity --prefix PYTHONPATH : "$(toPythonPath $out)"
+  '';
+
+  buildInputs = [python librsync makeWrapper];
+
+  meta = {
+    description = "Encrypted bandwidth-efficient backup using the rsync algorithm";
+    homepage = http://www.nongnu.org/duplicity;
+    license = "GPLv2+";
+    maintainers = with stdenv.lib.maintainers; [viric];
+    platforms = with stdenv.lib.platforms; linux;
+  };
+}
diff --git a/pkgs/tools/networking/p2p/tahoe-lafs/default.nix b/pkgs/tools/networking/p2p/tahoe-lafs/default.nix
index 0017c13a787..e333e6ab31f 100644
--- a/pkgs/tools/networking/p2p/tahoe-lafs/default.nix
+++ b/pkgs/tools/networking/p2p/tahoe-lafs/default.nix
@@ -11,7 +11,9 @@ buildPythonPackage (rec {
     sha256 = "10j6s4wqqxb0x6plwvfnabxxl0k8jy1g1dfsrhpfgdi42f25dain";
   };
 
-  patchPhase = ''
+  patches = [ ./fix-test-copy-using-filecap.patch ];
+
+  postPatch = ''
     echo "forcing the use of \`setuptools' 0.6c9 rather than an unreleased version"
     for i in *setup.py
     do
diff --git a/pkgs/tools/networking/p2p/tahoe-lafs/fix-test-copy-using-filecap.patch b/pkgs/tools/networking/p2p/tahoe-lafs/fix-test-copy-using-filecap.patch
new file mode 100644
index 00000000000..9318e0fa204
--- /dev/null
+++ b/pkgs/tools/networking/p2p/tahoe-lafs/fix-test-copy-using-filecap.patch
@@ -0,0 +1,23 @@
+From http://allmydata.org/trac/tahoe/ticket/936 .
+
+Wed Feb  3 23:13:37 GMT Standard Time 2010  david-sarah@jacaranda.org
+  * Fix race condition in allmydata.test.test_cli.Cp.test_copy_using_filecap
+diff -rN -u old-tahoe/src/allmydata/test/test_cli.py new-tahoe/src/allmydata/test/test_cli.py
+--- old-tahoe/src/allmydata/test/test_cli.py	2010-02-03 23:20:06.803000000 +0000
++++ new-tahoe/src/allmydata/test/test_cli.py	2010-02-03 23:20:10.483000000 +0000
+@@ -1007,13 +1007,13 @@
+         self.set_up_grid()
+         outdir = os.path.join(self.basedir, "outdir")
+         os.mkdir(outdir)
+-        self.do_cli("create-alias", "tahoe")
+         fn1 = os.path.join(self.basedir, "Metallica")
+         fn2 = os.path.join(outdir, "Not Metallica")
+         fn3 = os.path.join(outdir, "test2")
+         DATA1 = "puppies" * 10000
+         open(fn1, "wb").write(DATA1)
+-        d = self.do_cli("put", fn1)
++        d = self.do_cli("create-alias", "tahoe")
++        d.addCallback(lambda res: self.do_cli("put", fn1))
+         def _put_file((rc, out, err)):
+             self.failUnlessEqual(rc, 0)
+             # keep track of the filecap
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index bf6e23b77a1..836ecad2a1f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -614,6 +614,10 @@ let
     inherit builderDefs;
   };
 
+  duplicity = import ../tools/backup/duplicity {
+    inherit fetchurl stdenv librsync makeWrapper python;
+  };
+
   dvdplusrwtools = import ../tools/cd-dvd/dvd+rw-tools {
     inherit fetchurl stdenv cdrkit m4;
   };
@@ -923,7 +927,7 @@ let
 
   ipmitool = import ../tools/system/ipmitool {
     inherit fetchurl stdenv openssl;
-    static = getPkgConfig "ipmitool" "static" false;
+    static = !stdenv.isDarwin && getPkgConfig "ipmitool" "static" false;
   };
 
   jdiskreport = import ../tools/misc/jdiskreport {
@@ -1223,7 +1227,7 @@ let
   openssh = import ../tools/networking/openssh {
     inherit fetchurl stdenv zlib openssl pam perl;
     pamSupport = getPkgConfig "openssh" "pam" true;
-    hpnSupport = getPkgConfig "openssh" "hpn" true;
+    hpnSupport = getPkgConfig "openssh" "hpn" false;
     etcDir = getPkgConfig "openssh" "etcDir" "/etc/ssh";
   };
 
@@ -4318,6 +4322,10 @@ let
     inherit fetchurl stdenv pkgconfig ncurses glib;
   };
 
+  librsync = import ../development/libraries/librsync {
+    inherit stdenv fetchurl;
+  };
+
   libsigcxx = import ../development/libraries/libsigcxx {
     inherit fetchurl stdenv pkgconfig;
   };
@@ -4838,9 +4846,13 @@ let
     inherit fetchurl stdenv libogg;
   };
 
-  sqlite = import ../development/libraries/sqlite {
+  sqlite = lowPrio (import ../development/libraries/sqlite {
     inherit fetchurl stdenv;
-  };
+  });
+
+  sqliteInteractive = appendToName "interactive" (import ../development/libraries/sqlite {
+    inherit fetchurl stdenv readline ncurses;
+  });
 
   stlport =  import ../development/libraries/stlport {
     inherit fetchurl stdenv;
@@ -5623,6 +5635,10 @@ let
     inherit fetchurl stdenv;
   };
 
+  dmtcp = import ../os-specific/linux/dmtcp {
+    inherit fetchurl stdenv perl python;
+  };
+
   dietlibc = import ../os-specific/linux/dietlibc {
     inherit fetchurl glibc;
     # Dietlibc 0.30 doesn't compile on PPC with GCC 4.1, bus GCC 3.4 works.