From 7fd0d020a559780d881ca46de336ab4a789c9f0f Mon Sep 17 00:00:00 2001
From: Nick Novitski <github@nicknovitski.com>
Date: Thu, 26 Jul 2018 10:15:56 -0700
Subject: [PATCH] yarn: add yarnpkg bin alias output

Because the hadoop project also provides a binary `yarn`, the yarn project [added this alias to help people with both hadoop and yarn installed](https://github.com/yarnpkg/yarn/issues/673#issuecomment-254004512).  Some scripts in the wild use this alias for the same reason.
---
 pkgs/development/tools/yarn/default.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/tools/yarn/default.nix b/pkgs/development/tools/yarn/default.nix
index f1336b89194e..bf8dbf671c01 100644
--- a/pkgs/development/tools/yarn/default.nix
+++ b/pkgs/development/tools/yarn/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, nodejs, fetchzip, makeWrapper }:
+{ stdenv, nodejs, fetchzip }:
 
 stdenv.mkDerivation rec {
   name = "yarn-${version}";
@@ -9,12 +9,13 @@ stdenv.mkDerivation rec {
     sha256 = "0bk006zs1bk6nwj9x07ry314fgxi21sk79h1paljbs6yzrv62h4g";
   };
 
-  buildInputs = [ makeWrapper nodejs ];
+  buildInputs = [ nodejs ];
 
   installPhase = ''
     mkdir -p $out/{bin,libexec/yarn/}
     cp -R . $out/libexec/yarn
-    makeWrapper $out/libexec/yarn/bin/yarn.js $out/bin/yarn
+    ln -s $out/libexec/yarn/bin/yarn.js $out/bin/yarn
+    ln -s $out/libexec/yarn/bin/yarn.js $out/bin/yarnpkg
   '';
 
   meta = with stdenv.lib; {