diff --git a/.gitignore b/.gitignore
index 1f3e5be..e1fdd86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -222,5 +222,6 @@ AppPackages
 project.lock.json
 msbuild.binlog
 *.project.lock.json
-/build/tools
+/build/tools/**
+!/build/tools/packages.config
 /build/dotnet-install.ps1
diff --git a/build/build.cake b/build/build.cake
index e79c9e3..9c4d3a8 100644
--- a/build/build.cake
+++ b/build/build.cake
@@ -1,7 +1,7 @@
 #module nuget:?package=Cake.LongPath.Module&version=0.5.0
 
-#addin "Cake.FileHelpers"
-#addin "Cake.Powershell"
+#addin nuget:?package=Cake.FileHelpers&version=3.2.1
+#addin nuget:?package=Cake.Powershell&version=0.4.8
 
 using System;
 using System.Linq;
diff --git a/build/tools/packages.config b/build/tools/packages.config
new file mode 100644
index 0000000..ec87d00
--- /dev/null
+++ b/build/tools/packages.config
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+    <package id="Cake" version="0.35.0" />
+</packages>