Add Haskell package dyre

This adds the Haskell package xdg-basedir as well.

pkgs/development/libraries/haskell/dyre/default.nix

@@ -0,0 +1,18 @@
+{ cabal, binary, executablePath, filepath, ghcPaths, ioStorage
+, time, xdgBasedir
+}:
+
+cabal.mkDerivation (self: {
+  pname = "dyre";
+  version = "0.8.11";
+  sha256 = "0sg5csshznbbyvq72s4sps7bkjlkfxiwcy4i3ip83lrxjw1msvr8";
+  buildDepends = [
+    binary executablePath filepath ghcPaths ioStorage time xdgBasedir
+  ];
+  meta = {
+    homepage = "http://github.com/willdonnelly/dyre";
+    description = "Dynamic reconfiguration in Haskell";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/development/libraries/haskell/xdg-basedir/default.nix

@@ -0,0 +1,14 @@
+{ cabal, filepath }:
+
+cabal.mkDerivation (self: {
+  pname = "xdg-basedir";
+  version = "0.2.2";
+  sha256 = "0azlzaxp2dn4l1nr7shsxah2magk1szf6fx0mv75az00qsjw6qg4";
+  buildDepends = [ filepath ];
+  meta = {
+    homepage = "http://github.com/willdonnelly/xdg-basedir";
+    description = "A basic implementation of the XDG Base Directory specification";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/top-level/haskell-packages.nix

@@ -751,6 +751,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   dualTree = callPackage ../development/libraries/haskell/dual-tree {};
 
+  dyre = callPackage ../development/libraries/haskell/dyre {};
+
   editDistance = callPackage ../development/libraries/haskell/edit-distance {};
 
   editline = callPackage ../development/libraries/haskell/editline {};
@@ -1833,6 +1835,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   X11Xft = callPackage ../development/libraries/haskell/X11-xft {};
 
+  xdgBasedir = callPackage ../development/libraries/haskell/xdg-basedir {};
+
   xdot = callPackage ../development/libraries/haskell/xdot {
     polyparse = self.polyparse_1_7;
   };