From 736fe5ae59b3c5c11a36985756873732fb3e4d1f Mon Sep 17 00:00:00 2001
From: Matt McHenry <github@matt.mchenryfamily.org>
Date: Sun, 20 Jan 2019 19:20:30 -0500
Subject: [PATCH] elm: fix UnsafePath error downloading dependencies

---
 pkgs/development/compilers/elm/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/compilers/elm/default.nix b/pkgs/development/compilers/elm/default.nix
index aa8d9da9faaf..bfaf24cd9872 100644
--- a/pkgs/development/compilers/elm/default.nix
+++ b/pkgs/development/compilers/elm/default.nix
@@ -14,6 +14,12 @@ let
                 elmPackages = (import ./packages/elm-srcs.nix);
                 versionsDat = ./versions.dat;
               };
+              patches = [
+                (fetchpatch {
+                  url = "https://github.com/elm/compiler/pull/1886/commits/39d86a735e28da514be185d4c3256142c37c2a8a.patch";
+                  sha256 = "0nni5qx1523rjz1ja42z6z9pijxvi3fgbw1dhq5qi11mh1nb9ay7";
+                })
+              ];
               buildTools = drv.buildTools or [] ++ [ makeWrapper ];
               jailbreak = true;
               postInstall = ''