From b080efe4dcafee3ecbe5975e59b5a74c575def5f Mon Sep 17 00:00:00 2001
From: Luca Bruno <lethalman88@gmail.com>
Date: Wed, 28 Oct 2015 11:00:54 +0100
Subject: [PATCH] goPackages.tools: add setup-hook for setting GOTOOLDIR

---
 pkgs/development/go-modules/tools/setup-hook.sh | 1 +
 pkgs/top-level/go-packages.nix                  | 8 ++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 pkgs/development/go-modules/tools/setup-hook.sh

diff --git a/pkgs/development/go-modules/tools/setup-hook.sh b/pkgs/development/go-modules/tools/setup-hook.sh
new file mode 100644
index 000000000000..e354e50c35aa
--- /dev/null
+++ b/pkgs/development/go-modules/tools/setup-hook.sh
@@ -0,0 +1 @@
+export GOTOOLDIR=@bin@/bin
diff --git a/pkgs/top-level/go-packages.nix b/pkgs/top-level/go-packages.nix
index f344de0f6892..55c8baac353d 100644
--- a/pkgs/top-level/go-packages.nix
+++ b/pkgs/top-level/go-packages.nix
@@ -133,6 +133,14 @@ let
     # Do not copy this without a good reason for enabling
     # In this case tools is heavily coupled with go itself and embeds paths.
     allowGoReference = true;
+
+    # Set GOTOOLDIR for derivations adding this to buildInputs
+    postInstall = ''
+      mkdir -p $bin/nix-support
+      substituteAll ${../development/go-modules/tools/setup-hook.sh} $bin/nix-support/setup-hook.tmp
+      cat $bin/nix-support/setup-hook.tmp >> $bin/nix-support/setup-hook
+      rm $bin/nix-support/setup-hook.tmp
+    '';
   };