From 895b1cb1b06fc580f6ab5f0cdaaab7140895103f Mon Sep 17 00:00:00 2001
From: Michael Fellinger <m.fellinger@gmail.com>
Date: Mon, 19 Feb 2018 22:56:17 +0100
Subject: [PATCH 1/2] gem-config: add ethon

The Ethon gem uses libcurl.so at runtime via FFI, so we need to specify the correct location.
---
 pkgs/development/ruby-modules/gem-config/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 5361c3ce65eb..6ae3c824a4eb 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -87,6 +87,14 @@ in
       sed -i $installPath/lib/dep-selector-libgecode.rb -e 's@VENDORED_GECODE_DIR =.*@VENDORED_GECODE_DIR = "${gecode_3}"@'
     '';
   };
+  
+  ethon = attrs: {
+    dontBuild = false;
+    postPatch = ''
+      substituteInPlace lib/ethon/curls/settings.rb \
+        --replace "libcurl" "${curl.out}/lib/libcurl.so"
+    '';
+  }; 
 
   eventmachine = attrs: {
     buildInputs = [ openssl ];

From 1313542b6b602f43fa6e1c2ee84400753fc9c97a Mon Sep 17 00:00:00 2001
From: Michael Fellinger <m.fellinger@gmail.com>
Date: Tue, 20 Feb 2018 11:29:07 +0100
Subject: [PATCH 2/2] Support darwin

---
 pkgs/development/ruby-modules/gem-config/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 6ae3c824a4eb..8da6355e0016 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -92,7 +92,7 @@ in
     dontBuild = false;
     postPatch = ''
       substituteInPlace lib/ethon/curls/settings.rb \
-        --replace "libcurl" "${curl.out}/lib/libcurl.so"
+        --replace "libcurl" "${curl.out}/lib/libcurl${stdenv.hostPlatform.extensions.sharedLibrary}"
     '';
   };