From 8dc7d34942bfe6a6631967284596a3990451fbcb Mon Sep 17 00:00:00 2001
From: Justin Wood <justin.k.wood@gmail.com>
Date: Wed, 12 Jul 2017 10:01:40 -0400
Subject: LFE 1.2 does not support OTP 20

---
 pkgs/development/interpreters/lfe/1.2.nix             | 1 +
 pkgs/development/interpreters/lfe/generic-builder.nix | 6 ++++++
 2 files changed, 7 insertions(+)

(limited to 'pkgs/development/interpreters/lfe')

diff --git a/pkgs/development/interpreters/lfe/1.2.nix b/pkgs/development/interpreters/lfe/1.2.nix
index 2bd1df41fb606..b81acdaa499eb 100644
--- a/pkgs/development/interpreters/lfe/1.2.nix
+++ b/pkgs/development/interpreters/lfe/1.2.nix
@@ -3,4 +3,5 @@
 mkDerivation {
   version = "1.2.1";
   sha256 = "0j5gjlsk92y14kxgvd80q9vwyhmjkphpzadcswyjxikgahwg1avz";
+  maximumOTPVersion = "19";
 }
diff --git a/pkgs/development/interpreters/lfe/generic-builder.nix b/pkgs/development/interpreters/lfe/generic-builder.nix
index 9595337bd56c0..fb034a471e7c3 100644
--- a/pkgs/development/interpreters/lfe/generic-builder.nix
+++ b/pkgs/development/interpreters/lfe/generic-builder.nix
@@ -2,12 +2,17 @@
 
 { baseName ? "lfe"
 , version
+, maximumOTPVersion
 , sha256 ? null
 , rev ? version
 , src ? fetchFromGitHub { inherit rev sha256; owner = "rvirding"; repo = "lfe"; }
 }:
 
 let
+  inherit (stdenv.lib) getVersion versionAtLeast splitString head;
+
+  mainVersion = head (splitString "." (getVersion erlang));
+
   proper = buildHex {
     name = "proper";
     version = "1.1.1-beta";
@@ -20,6 +25,7 @@ let
   };
 
 in
+assert versionAtLeast maximumOTPVersion mainVersion;
 
 buildRebar3 {
   name = baseName;
-- 
cgit 1.4.1