diff --git a/pkgs/applications/version-management/git-and-tools/default.nix b/pkgs/applications/version-management/git-and-tools/default.nix
index a942babdbd09..f2e7b6b98e95 100644
--- a/pkgs/applications/version-management/git-and-tools/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/default.nix
@@ -47,9 +47,8 @@ rec {
 
   gitAnnex = lib.makeOverridable (import ./git-annex) {
     inherit stdenv fetchurl libuuid rsync findutils curl perl git ikiwiki which coreutils;
-    inherit (haskellPackages) ghc MissingH utf8String pcreLight SHA dataenc
-      HTTP testpack hS3 mtl network hslogger hxt json liftedBase monadControl;
-    QuickCheck2 = haskellPackages.QuickCheck_2_4_0_1;
+    inherit (haskellPackages_ghc741) ghc MissingH utf8String pcreLight SHA dataenc
+      HTTP testpack hS3 mtl network hslogger hxt json liftedBase monadControl IfElse QuickCheck2;
   };
 
   qgit = import ./qgit {
diff --git a/pkgs/applications/version-management/git-and-tools/git-annex/default.nix b/pkgs/applications/version-management/git-and-tools/git-annex/default.nix
index 759bd66beb93..9a2cb7f71f77 100644
--- a/pkgs/applications/version-management/git-and-tools/git-annex/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/git-annex/default.nix
@@ -1,32 +1,33 @@
 { stdenv, fetchurl, curl, dataenc, findutils, ghc, git, hS3, hslogger, HTTP, hxt
 , ikiwiki, json, libuuid, MissingH, monadControl, mtl, network, pcreLight, perl
-, QuickCheck2, rsync, SHA, testpack, utf8String, which, liftedBase, coreutils
+, QuickCheck2, rsync, SHA, testpack, utf8String, which, liftedBase, coreutils, IfElse
 }:
 
 let
-  version = "3.20120123";
+  version = "3.20120230";
 in
 stdenv.mkDerivation {
   name = "git-annex-${version}";
 
   src = fetchurl {
     url = "http://ftp.de.debian.org/debian/pool/main/g/git-annex/git-annex_${version}.tar.gz";
-    sha256 = "dad93dad08ddfd0d239ee57bbf61dd2ee3755d9a94e2946ac5d7bb4cfa565488";
+    sha256 = "2406fd1405bcdc30cb57ba0455919b5bad2be64bcfe6b6f921cd6ea1797a66fa";
   };
 
   buildInputs = [
     curl dataenc findutils ghc git hS3 hslogger HTTP hxt ikiwiki json
     libuuid MissingH monadControl mtl network pcreLight perl QuickCheck2
-    rsync SHA testpack utf8String which liftedBase
+    rsync SHA testpack utf8String which liftedBase IfElse
   ];
 
   checkTarget = "test";
   doCheck = true;
 
+  # The 'add_url' test fails because it attempts to use the network.
   preConfigure = ''
     makeFlagsArray=( PREFIX=$out )
     sed -i -e 's|#!/usr/bin/perl|#!${perl}/bin/perl|' mdwn2man
-    sed -i -e 's|"cp |"${coreutils}/bin/cp |' -e 's|"rm -f |"${coreutils}/bin/rm -f |' test.hs
+    sed -i -e 's|"cp |"${coreutils}/bin/cp |' -e 's|"rm -f |"${coreutils}/bin/rm -f |' -e 's|, test_addurl||' test.hs
   '';
 
   meta = {
diff --git a/pkgs/development/libraries/haskell/Crypto/class-constraints.diff b/pkgs/development/libraries/haskell/Crypto/class-constraints.diff
new file mode 100644
index 000000000000..77035322678a
--- /dev/null
+++ b/pkgs/development/libraries/haskell/Crypto/class-constraints.diff
@@ -0,0 +1,27 @@
+--- a/Data/Digest/SHA2.hs
++++ b/Data/Digest/SHA2.hs
+@@ -106,7 +106,7 @@
+ data Hash384 = Hash384 !Word64 !Word64 !Word64 !Word64 !Word64 !Word64 deriving (Eq, Ord)
+ data Hash224 = Hash224 !Word32 !Word32 !Word32 !Word32 !Word32 !Word32 !Word32 deriving (Eq, Ord)
+ 
+-instance (Integral a) => Show (Hash8 a) where
++instance (Integral a, Show a) => Show (Hash8 a) where
+  showsPrec _ (Hash8 a b c d e f g h) =
+   (showHex a) . (' ':) .
+   (showHex b) . (' ':) .
+@@ -146,7 +146,7 @@
+      where
+       bs = bitSize (head r)
+ 
+-instance (Integral h, Bits h) => Hash (Hash8 h) where
++instance (Integral h, Bits h, Show h) => Hash (Hash8 h) where
+   toOctets (Hash8 x0 x1 x2 x3 x4 x5 x6 x7) = bitsToOctets =<< [x0, x1, x2, x3, x4, x5, x6, x7]
+ 
+ instance Hash Hash384 where
+@@ -282,4 +282,4 @@
+ 
+ -- Test with:
+ -- ghc -no-recomp -O --make Data/Digest/SHA2.hs -main-is Data.Digest.SHA2.moduleTest -o moduleTest && ./moduleTest && rm moduleTest
+-moduleTest = runTestTT test_sha2
+\ No newline at end of file
++moduleTest = runTestTT test_sha2
diff --git a/pkgs/development/libraries/haskell/Crypto/default.nix b/pkgs/development/libraries/haskell/Crypto/default.nix
index 0adb00ccc862..01bc1a1a0126 100644
--- a/pkgs/development/libraries/haskell/Crypto/default.nix
+++ b/pkgs/development/libraries/haskell/Crypto/default.nix
@@ -7,6 +7,7 @@ cabal.mkDerivation (self: {
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ HUnit QuickCheck random ];
+  patches = [ ./class-constraints.diff ];
   meta = {
     description = "Collects together existing Haskell cryptographic functions into a package";
     license = "unknown";
diff --git a/pkgs/development/libraries/haskell/base64-bytestring/0.1.1.0.nix b/pkgs/development/libraries/haskell/base64-bytestring/0.1.1.0.nix
deleted file mode 100644
index 304889991f05..000000000000
--- a/pkgs/development/libraries/haskell/base64-bytestring/0.1.1.0.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{ cabal }:
-
-cabal.mkDerivation (self: {
-  pname = "base64-bytestring";
-  version = "0.1.1.0";
-  sha256 = "0vdmwajxg6w924pcsls45bz4bn29xgl3sgvdp2g1jb8f7qb58r7i";
-  meta = {
-    homepage = "https://github.com/bos/base64-bytestring";
-    description = "Fast base64 encoding and deconding for ByteStrings";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    maintainers = [
-      self.stdenv.lib.maintainers.andres
-      self.stdenv.lib.maintainers.simons
-    ];
-  };
-})
diff --git a/pkgs/development/libraries/haskell/base64-bytestring/0.1.0.3.nix b/pkgs/development/libraries/haskell/base64-bytestring/default.nix
similarity index 82%
rename from pkgs/development/libraries/haskell/base64-bytestring/0.1.0.3.nix
rename to pkgs/development/libraries/haskell/base64-bytestring/default.nix
index f974a72347fd..3690c8cff76b 100644
--- a/pkgs/development/libraries/haskell/base64-bytestring/0.1.0.3.nix
+++ b/pkgs/development/libraries/haskell/base64-bytestring/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "base64-bytestring";
-  version = "0.1.0.3";
-  sha256 = "0d4j8b1d8z9qr1y446bfkj764xgilk8gw2frj0wn0717y8knvmx3";
+  version = "0.1.1.1";
+  sha256 = "0j0jns0yf7dv2bx91hayc8hx0pdab7rhkjllmkl8019kf8rx3gwd";
   meta = {
     homepage = "https://github.com/bos/base64-bytestring";
     description = "Fast base64 encoding and deconding for ByteStrings";
diff --git a/pkgs/development/libraries/haskell/clientsession/default.nix b/pkgs/development/libraries/haskell/clientsession/default.nix
index d4a770d34b74..e89be643ea49 100644
--- a/pkgs/development/libraries/haskell/clientsession/default.nix
+++ b/pkgs/development/libraries/haskell/clientsession/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "clientsession";
-  version = "0.7.4.1";
-  sha256 = "1fnrngbx86zcvh0ybv7ans132d216ayxdzlgw0x4qh0sw9r3w2ip";
+  version = "0.7.4.2";
+  sha256 = "0b1afz9frky3kp2crrkmk8cvj77fnyyxrfv1ky0p0cb0lllvdhwp";
   buildDepends = [
     base64Bytestring cereal cprngAes cryptoApi cryptocipher entropy
     skein tagged
diff --git a/pkgs/development/libraries/haskell/xss-sanitize/default.nix b/pkgs/development/libraries/haskell/xss-sanitize/default.nix
index 745480ecf0c6..aa74f72ba3e7 100644
--- a/pkgs/development/libraries/haskell/xss-sanitize/default.nix
+++ b/pkgs/development/libraries/haskell/xss-sanitize/default.nix
@@ -2,13 +2,13 @@
 
 cabal.mkDerivation (self: {
   pname = "xss-sanitize";
-  version = "0.3.1";
-  sha256 = "0s8nqqx5f5b07xxlda4gh0w6vmlkhbqbz36cf6glhbhhyw27jkx5";
+  version = "0.3.1.1";
+  sha256 = "1nv28nk1fdxym1vv50wgkyfkinpr3bd7cn6vwi41x5iqy9vgjjpl";
   buildDepends = [
     attoparsec cssText network tagsoup text utf8String
   ];
   meta = {
-    homepage = "http://github.com/gregwebs/haskell-xss-sanitize";
+    homepage = "http://github.com/yesodweb/haskell-xss-sanitize";
     description = "sanitize untrusted HTML to prevent XSS attacks";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
diff --git a/pkgs/tools/backup/btar/default.nix b/pkgs/tools/backup/btar/default.nix
index 2ec82ff4a68a..7fe9e5252d80 100644
--- a/pkgs/tools/backup/btar/default.nix
+++ b/pkgs/tools/backup/btar/default.nix
@@ -1,10 +1,10 @@
 { stdenv, fetchurl, librsync }:
 
 stdenv.mkDerivation rec {
-  name = "btar-0.9.1";
+  name = "btar-0.9.2";
   src = fetchurl {
     url = "http://vicerveza.homeunix.net/~viric/soft/btar/${name}.tar.gz";
-    sha256 = "1fmaq5z81zvs3gjrkwnqz8nb4a6dqij5cmw99jhcaxlnwl45y3vj";
+    sha256 = "113l5qn3qizxnv2r0w8awnm9agjsmf39fl5w9gcvrxqy021f2jd9";
   };
 
   buildInputs = [ librsync ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 117c954b71cb..f631179be4c3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7557,7 +7557,8 @@ let
 
   xaos = builderDefsPackage (import ../applications/graphics/xaos) {
     inherit (xlibs) libXt libX11 libXext xextproto xproto;
-    inherit gsl aalib zlib libpng intltool gettext perl;
+    inherit gsl aalib zlib intltool gettext perl;
+    libpng = libpng12;
   };
 
   xara = callPackage ../applications/graphics/xara { };
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 82f0fd366055..d1162884f90b 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -456,9 +456,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   base64String = callPackage ../development/libraries/haskell/base64-string {};
 
-  base64Bytestring_0_1_0_3 = callPackage ../development/libraries/haskell/base64-bytestring/0.1.0.3.nix {};
-  base64Bytestring_0_1_1_0 = callPackage ../development/libraries/haskell/base64-bytestring/0.1.1.0.nix {};
-  base64Bytestring = self.base64Bytestring_0_1_0_3; # Version 0.1.1.0 has serious performance issues.
+  base64Bytestring = callPackage ../development/libraries/haskell/base64-bytestring {};
 
   baseUnicodeSymbols = callPackage ../development/libraries/haskell/base-unicode-symbols {};