diff --git a/pkgs/development/libraries/haskell/ListLike/default.nix b/pkgs/development/libraries/haskell/ListLike/default.nix
index a50fdb8ddc04..f0b1ccd8bc04 100644
--- a/pkgs/development/libraries/haskell/ListLike/default.nix
+++ b/pkgs/development/libraries/haskell/ListLike/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "ListLike";
-  version = "3.1.4";
-  sha256 = "0cpj7vqlazs2yzh0ffhlg69kdb18xyicybfw614nlqfhhrp53lj9";
+  version = "3.1.5";
+  sha256 = "0hxpjmj5qdyb55wda2bgd3crkg9q6dklhj2kff7qz6wkx5fdbvjs";
   isLibrary = true;
   isExecutable = true;
   meta = {
diff --git a/pkgs/development/libraries/haskell/bson/default.nix b/pkgs/development/libraries/haskell/bson/default.nix
index 3e0aacbaa9d4..95700df7eef8 100644
--- a/pkgs/development/libraries/haskell/bson/default.nix
+++ b/pkgs/development/libraries/haskell/bson/default.nix
@@ -1,17 +1,16 @@
-{ cabal, binary, compactStringFix, cryptohash, dataBinaryIeee754
-, mtl, network, time
+{ cabal, binary, cryptohash, dataBinaryIeee754, mtl, network, text
+, time
 }:
 
 cabal.mkDerivation (self: {
   pname = "bson";
-  version = "0.1.7";
-  sha256 = "1dmndq0rx22h9kxv31rxwqhwkgsvqg9qy4l0xmvpcvvl101zj4jx";
+  version = "0.2.0";
+  sha256 = "1m4bzbl3i9p8v78zjb4ilrpdxbxpqz5bgcpklvvkb2ipfkgqhmhx";
   buildDepends = [
-    binary compactStringFix cryptohash dataBinaryIeee754 mtl network
-    time
+    binary cryptohash dataBinaryIeee754 mtl network text time
   ];
   meta = {
-    homepage = "http://github.com/TonyGen/bson-haskell";
+    homepage = "http://github.com/selectel/bson-haskell";
     description = "BSON documents are JSON-like objects with a standard binary encoding";
     license = "unknown";
     platforms = self.ghc.meta.platforms;
diff --git a/pkgs/development/libraries/haskell/cpu/default.nix b/pkgs/development/libraries/haskell/cpu/default.nix
index 832b7db03690..dc27553c2a3b 100644
--- a/pkgs/development/libraries/haskell/cpu/default.nix
+++ b/pkgs/development/libraries/haskell/cpu/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "cpu";
-  version = "0.1.0";
-  sha256 = "020s1cv3qkhjq0gypxligg2x68izb3z82krv8y1m1k360554nqyg";
+  version = "0.1.1";
+  sha256 = "0ygkxx8ksa0rh63569d3g0w8pzgwg6062sd4yyi3q646zcmryhj6";
   isLibrary = true;
   isExecutable = true;
   meta = {
diff --git a/pkgs/development/libraries/haskell/iteratee/default.nix b/pkgs/development/libraries/haskell/iteratee/default.nix
index 2a2708f70ac5..14c125121bde 100644
--- a/pkgs/development/libraries/haskell/iteratee/default.nix
+++ b/pkgs/development/libraries/haskell/iteratee/default.nix
@@ -1,14 +1,16 @@
-{ cabal, ListLike, MonadCatchIOTransformers, parallel, transformers
+{ cabal, ListLike, MonadCatchIOTransformers, monadControl, parallel
+, transformers, transformersBase
 }:
 
 cabal.mkDerivation (self: {
   pname = "iteratee";
-  version = "0.8.8.2";
-  sha256 = "1d76an95y8svaja5ksx8p05fk22z62hp3gfwnd1d917qccffw6ry";
+  version = "0.8.9.1";
+  sha256 = "1yk7jvabmabf0qjcd00imbg7vx84yjf71h7x3zbv4a51ykfy5hax";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [
-    ListLike MonadCatchIOTransformers parallel transformers
+    ListLike MonadCatchIOTransformers monadControl parallel
+    transformers transformersBase
   ];
   meta = {
     homepage = "http://www.tiresiaspress.us/haskell/iteratee";
diff --git a/pkgs/development/libraries/haskell/mongoDB/default.nix b/pkgs/development/libraries/haskell/mongoDB/default.nix
index ddbbdcb8093e..aec216ea59d1 100644
--- a/pkgs/development/libraries/haskell/mongoDB/default.nix
+++ b/pkgs/development/libraries/haskell/mongoDB/default.nix
@@ -1,17 +1,17 @@
 { cabal, binary, bson, cryptohash, liftedBase, monadControl, mtl
-, network, parsec, random, randomShuffle, transformersBase
+, network, parsec, random, randomShuffle, text, transformersBase
 }:
 
 cabal.mkDerivation (self: {
   pname = "mongoDB";
-  version = "1.2.0";
-  sha256 = "0rffa13p889mxbbkj2bmqy3yada3mrhngvp8pp7qvrll1acm7s13";
+  version = "1.3.0";
+  sha256 = "1l6r55bicjdybn8jn9rp94aamjqy5j5qs2775m05aba8svsl4kma";
   buildDepends = [
     binary bson cryptohash liftedBase monadControl mtl network parsec
-    random randomShuffle transformersBase
+    random randomShuffle text transformersBase
   ];
   meta = {
-    homepage = "http://github.com/TonyGen/mongoDB-haskell";
+    homepage = "http://github.com/selectel/mongodb-haskell";
     description = "Driver (client) for MongoDB, a free, scalable, fast, document DBMS";
     license = "unknown";
     platforms = self.ghc.meta.platforms;
diff --git a/pkgs/development/libraries/haskell/stringsearch/default.nix b/pkgs/development/libraries/haskell/stringsearch/default.nix
new file mode 100644
index 000000000000..8b5a81461506
--- /dev/null
+++ b/pkgs/development/libraries/haskell/stringsearch/default.nix
@@ -0,0 +1,13 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "stringsearch";
+  version = "0.3.6.3";
+  sha256 = "1f0sl1zjya8glvlscf3g5i0in0ai1knls7kg9dp82grg2k287sgz";
+  meta = {
+    homepage = "https://bitbucket.org/dafis/stringsearch";
+    description = "Fast searching, splitting and replacing of ByteStrings";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/system-fileio/default.nix b/pkgs/development/libraries/haskell/system-fileio/default.nix
index 4176cf2f6e21..58284655eb88 100644
--- a/pkgs/development/libraries/haskell/system-fileio/default.nix
+++ b/pkgs/development/libraries/haskell/system-fileio/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "system-fileio";
-  version = "0.3.7";
-  sha256 = "0vjjpn3fq0s2assfg3p3wpk60jsrjp1f6i0djm3abdbmc53gqyi0";
+  version = "0.3.8";
+  sha256 = "0zv7ngxc3qgrlfbp0vqirzcwmkmi9ql8pgqhn1ls56iqwbxbb654";
   buildDepends = [ systemFilepath text time ];
   meta = {
     homepage = "https://john-millikin.com/software/haskell-filesystem/";
diff --git a/pkgs/development/libraries/haskell/wai-extra/default.nix b/pkgs/development/libraries/haskell/wai-extra/default.nix
index 9e716eb6c13f..3c808dd430b7 100644
--- a/pkgs/development/libraries/haskell/wai-extra/default.nix
+++ b/pkgs/development/libraries/haskell/wai-extra/default.nix
@@ -1,16 +1,17 @@
 { cabal, ansiTerminal, blazeBuilder, blazeBuilderConduit
 , caseInsensitive, conduit, dataDefault, fastLogger, httpTypes
-, network, resourcet, text, time, transformers, wai, zlibConduit
+, network, resourcet, stringsearch, text, time, transformers, wai
+, zlibConduit
 }:
 
 cabal.mkDerivation (self: {
   pname = "wai-extra";
-  version = "1.2.0.4";
-  sha256 = "10nd87bs6q1827ihwm13czflha2g8dhza443n55xpakba1sdgsaz";
+  version = "1.2.0.5";
+  sha256 = "0m9zdn6cdh2j7bwsf17225rdn7jwj7iy97khbd9g7p9rv1lpdain";
   buildDepends = [
     ansiTerminal blazeBuilder blazeBuilderConduit caseInsensitive
-    conduit dataDefault fastLogger httpTypes network resourcet text
-    time transformers wai zlibConduit
+    conduit dataDefault fastLogger httpTypes network resourcet
+    stringsearch text time transformers wai zlibConduit
   ];
   meta = {
     homepage = "http://github.com/yesodweb/wai";
diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index d09d34dbf6d4..64291854a03e 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -245,7 +245,6 @@
                prefFun = ghc741Prefs;
              };
 
-  # Stable branch snapshot.
   packages_ghc742 =
     packages { ghcPath = ../development/compilers/ghc/7.4.2.nix;
                ghcBinary = ghc6121BinaryDarwin;
@@ -255,8 +254,7 @@
   # Reasonably current HEAD snapshot. Should *always* be lowPrio.
   packages_ghcHEAD =
     packages { ghcPath = ../development/compilers/ghc/head.nix;
-               ghcBinary = # (packages_ghc704.ghcWithPackages (self : [ self.alex self.happy ]))
-                           ghc704Binary;
+               ghcBinary = ghc704Binary;
                prefFun = ghcHEADPrefs;
              };
 
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index b009bcad23e1..85ac31b46ef2 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -149,7 +149,6 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
     happy        = self.happy_1_18_9;           # 7.4.2 ok
   };
 
-
   haskellPlatformArgs_2012_2_0_0 = self : {
     inherit (self) cabal ghc;
     cgi          = self.cgi_3001_1_7_4;         # 7.4.1 ok
@@ -1279,6 +1278,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   stringCombinators = callPackage ../development/libraries/haskell/string-combinators {};
 
+  stringsearch = callPackage ../development/libraries/haskell/stringsearch {};
+
   syb_0_2_2 = callPackage ../development/libraries/haskell/syb/0.2.2.nix {};
   syb_0_3 = callPackage ../development/libraries/haskell/syb/0.3.nix {};
   syb_0_3_3 = callPackage ../development/libraries/haskell/syb/0.3.3.nix {};