diff --git a/pkgs/development/libraries/haskell/io-streams/default.nix b/pkgs/development/libraries/haskell/io-streams/default.nix
new file mode 100644
index 0000000000000..23444ab50bd9b
--- /dev/null
+++ b/pkgs/development/libraries/haskell/io-streams/default.nix
@@ -0,0 +1,31 @@
+{ cabal, attoparsec, blazeBuilder, deepseq, filepath, HUnit, mtl
+, network, primitive, QuickCheck, testFramework, testFrameworkHunit
+, testFrameworkQuickcheck2, text, time, transformers, vector, zlib
+, zlibBindings
+}:
+
+cabal.mkDerivation (self: {
+  pname = "io-streams";
+  version = "1.1.2.2";
+  sha256 = "1miq7sbvbsi6wi3siqr8w8d21v7x4axs0yrcd816xnjnjw19082j";
+  buildDepends = [
+    attoparsec blazeBuilder network primitive text time transformers
+    vector zlibBindings
+  ];
+
+  enableCheckPhase = false;
+  doCheck = false;
+  checkPhase = "";
+
+  testDepends = [
+    attoparsec blazeBuilder deepseq filepath HUnit mtl network
+    primitive QuickCheck testFramework testFrameworkHunit
+    testFrameworkQuickcheck2 text time transformers vector zlib
+    zlibBindings
+  ];
+  meta = {
+    description = "Simple, composable, and easy-to-use stream I/O";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/websockets/default.nix b/pkgs/development/libraries/haskell/websockets/default.nix
new file mode 100644
index 0000000000000..7c557b86b889e
--- /dev/null
+++ b/pkgs/development/libraries/haskell/websockets/default.nix
@@ -0,0 +1,27 @@
+{ cabal, attoparsec, base64Bytestring, binary, blazeBuilder
+, caseInsensitive, entropy, HUnit, ioStreams, mtl, network
+, QuickCheck, random, SHA, testFramework, testFrameworkHunit
+, testFrameworkQuickcheck2, text
+}:
+
+cabal.mkDerivation (self: {
+  pname = "websockets";
+  version = "0.8.1.1";
+  sha256 = "0mgazf0s9sl53r5smidrfqcx7rq2v4kfm37f4f6mjrl656qxpbwd";
+  buildDepends = [
+    attoparsec base64Bytestring binary blazeBuilder caseInsensitive
+    entropy ioStreams mtl network random SHA text
+  ];
+
+  testDepends = [
+    attoparsec base64Bytestring binary blazeBuilder caseInsensitive
+    entropy HUnit ioStreams mtl network QuickCheck random SHA
+    testFramework testFrameworkHunit testFrameworkQuickcheck2 text
+  ];
+  meta = {
+    homepage = "http://jaspervdj.be/websockets";
+    description = "A sensible and clean way to write WebSocket-capable servers in Haskell";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index a837314cee1db..91c8f1078a288 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1391,6 +1391,10 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   ioStorage = callPackage ../development/libraries/haskell/io-storage {};
 
+  ioStreams = callPackage ../development/libraries/haskell/io-streams {
+    network = self.network_2_4_2_1;
+  };
+
   iproute = callPackage ../development/libraries/haskell/iproute {};
 
   irc = callPackage ../development/libraries/haskell/irc {};
@@ -2279,6 +2283,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   vcsRevision = callPackage ../development/libraries/haskell/vcs-revision {};
 
+  websockets = callPackage ../development/libraries/haskell/websockets {};
+
   Vec = callPackage ../development/libraries/haskell/Vec {};
 
   vect = callPackage ../development/libraries/haskell/vect {};