avoid-using-system-gem.patch

diff --git a/etc/rbenv.d/install/default-gems.bash b/etc/rbenv.d/install/default-gems.bash
index 2455887..a8a9a6a 100644
--- a/etc/rbenv.d/install/default-gems.bash
+++ b/etc/rbenv.d/install/default-gems.bash
@@ -34,7 +34,7 @@ install_default_gems() {
       # Invoke `gem install` in the just-installed Ruby. Point its
       # stdin to /dev/null or else it'll read from our default-gems
       # file.
-      RBENV_VERSION="$VERSION_NAME" gem install "$gem_name" "${args[@]}" < /dev/null || {
+      RBENV_VERSION="$VERSION_NAME" rbenv-exec gem install "$gem_name" "${args[@]}" < /dev/null || {
         echo "rbenv: error installing gem \`$gem_name'"
       } >&2
 

rbenv-default-gems.rb.patch

diff --git a/Library/Formula/rbenv-default-gems.rb b/Library/Formula/rbenv-default-gems.rb
index d11cfff..2f2dd76 100644
--- a/Library/Formula/rbenv-default-gems.rb
+++ b/Library/Formula/rbenv-default-gems.rb
@@ -13,4 +13,8 @@ class RbenvDefaultGems < Formula
   def install
     prefix.install Dir['*']
   end
+
+  def patches
+    "https://gist.githubusercontent.com/itiut/14fae93a6c619e545a5e/raw/50f46b843644b658592278e30a3a7c0b96a80f99/avoid-using-system-gem.patch"
+  end
 end