From d79b4766a5b123ec078045d9945c805c489e053b Mon Sep 17 00:00:00 2001
From: Matthew Daiter <matthew@nomoko.camera>
Date: Thu, 22 Jun 2017 15:50:37 +0200
Subject: [PATCH] erlangR20: init

---
 pkgs/development/interpreters/erlang/R20.nix | 10 ++++++++++
 pkgs/top-level/all-packages.nix              |  3 ++-
 pkgs/top-level/beam-packages.nix             |  8 ++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/development/interpreters/erlang/R20.nix

diff --git a/pkgs/development/interpreters/erlang/R20.nix b/pkgs/development/interpreters/erlang/R20.nix
new file mode 100644
index 000000000000..8866d9848e7a
--- /dev/null
+++ b/pkgs/development/interpreters/erlang/R20.nix
@@ -0,0 +1,10 @@
+{ mkDerivation, fetchurl }:
+
+mkDerivation rec {
+  version = "20.0";
+  sha256 = "12dbay254ivnakwknjn5h55wndb0a0wqx55p156h8hwjhykj2kn0";
+
+  prePatch = ''
+    substituteInPlace configure.in --replace '`sw_vers -productVersion`' '10.10'
+  '';
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2973e2d9b0f9..990bd593d4eb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5984,7 +5984,8 @@ with pkgs;
     erlang_basho_R16B02 erlang_basho_R16B02_odbc
     erlangR17 erlangR17_odbc erlangR17_javac erlangR17_odbc_javac
     erlangR18 erlangR18_odbc erlangR18_javac erlangR18_odbc_javac
-    erlangR19 erlangR19_odbc erlangR19_javac erlangR19_odbc_javac;
+    erlangR19 erlangR19_odbc erlangR19_javac erlangR19_odbc_javac
+    erlangR20;
 
   inherit (beam.packages)
     rebar rebar3-open rebar3
diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index 3451816c0c5b..3ac854c962f4 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -36,6 +36,14 @@ rec {
     erlangR19_odbc_javac = erlangR19.override {
       javacSupport = true; odbcSupport = true;
     };
+    erlangR20 = lib.callErlang ../development/interpreters/erlang/R20.nix {
+      wxGTK = wxGTK30;
+    };
+    erlangR20_odbc = erlangR20.override { odbcSupport = true; };
+    erlangR20_javac = erlangR20.override { javacSupport = true; };
+    erlangR20_odbc_javac = erlangR20.override {
+      javacSupport = true; odbcSupport = true;
+    };
 
     # Bash fork, using custom builder.
     erlang_basho_R16B02 = lib.callErlang ../development/interpreters/erlang/R16B02-8-basho.nix {