From 2d6d9682bb8a910f3eb5f0be8d5687c753e9732c Mon Sep 17 00:00:00 2001
From: Eric Merritt <eric@merritt.tech>
Date: Fri, 1 Apr 2016 13:13:02 -0700
Subject: [PATCH] elixir: set ERL_LIBS for elixir apps

Previously Elixir didn't correct set the ERL_LIBS environment
variable for the OTP Applications that it supplies. This
change fixes that
---
 pkgs/development/interpreters/elixir/default.nix   | 2 ++
 pkgs/development/interpreters/elixir/setup-hook.sh | 5 +++++
 2 files changed, 7 insertions(+)
 create mode 100644 pkgs/development/interpreters/elixir/setup-hook.sh

diff --git a/pkgs/development/interpreters/elixir/default.nix b/pkgs/development/interpreters/elixir/default.nix
index e45c6784e94..b612033c8e5 100644
--- a/pkgs/development/interpreters/elixir/default.nix
+++ b/pkgs/development/interpreters/elixir/default.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
   LANG = "en_US.UTF-8";
   LC_TYPE = "en_US.UTF-8";
 
+  setupHook = ./setup-hook.sh;
+
   buildFlags = if debugInfo
    then "ERL_COMPILER_OPTIONS=debug_info"
    else "";
diff --git a/pkgs/development/interpreters/elixir/setup-hook.sh b/pkgs/development/interpreters/elixir/setup-hook.sh
new file mode 100644
index 00000000000..2ed3b2e6454
--- /dev/null
+++ b/pkgs/development/interpreters/elixir/setup-hook.sh
@@ -0,0 +1,5 @@
+addErlLibPath() {
+    addToSearchPath ERL_LIBS $1/lib/elixir/lib
+}
+
+envHooks+=(addErlLibPath)