Add few erlang modules

pkgs/development/erlang-modules/default.nix

@@ -0,0 +1,38 @@
+{ pkgs }: #? import <nixpkgs> {} }:
+
+let
+  callPackage = pkgs.lib.callPackageWith (pkgs // self);
+
+  self = rec {
+    buildErlang = callPackage ./build-erlang.nix {};
+    buildHex = callPackage ./build-hex.nix {};
+
+    # dependencies for ejabberd
+    p1_utils = callPackage ./hex/p1_utils.nix {};
+    cache_tab = callPackage ./hex/cache_tab.nix {};
+    stringprep = callPackage ./hex/stringprep.nix {};
+    p1_xml = callPackage ./hex/p1_xml.nix {};
+    p1_tls = callPackage ./hex/p1_tls.nix {};
+    p1_stun = callPackage ./hex/p1_stun.nix {};
+    esip = callPackage ./hex/esip.nix {};
+    p1_yaml = callPackage ./hex/p1_yaml.nix {};
+    xmlrpc = callPackage ./hex/xmlrpc.nix {};
+    jiffy = callPackage ./hex/jiffy.nix {};
+    sync = callPackage ./hex/sync.nix {};
+    erlang-katana = callPackage ./hex/erlang-katana.nix {};
+    eper = callPackage ./hex/eper.nix {};
+
+    goldrush = callPackage ./hex/goldrush.nix {};
+    lager = callPackage ./hex/lager.nix {};
+    getopt = callPackage ./hex/getopt.nix {};
+    meck = callPackage ./hex/meck.nix {};
+    ibrowse = callPackage ./hex/ibrowse.nix {};
+    aleppo = callPackage ./hex/aleppo.nix {};
+    zipper = callPackage ./hex/zipper.nix {};
+    erlang-github = callPackage ./hex/erlang-github.nix {};
+
+    elvis = callPackage ./hex/elvis.nix {};
+    apns = callPackage ./hex/apns.nix {};
+    appmon = callPackage ./hex/appmon.nix {};
+  };
+in self