diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # Madlang DSL for generating random text
 
+[![Windows build status](https://ci.appveyor.com/api/projects/status/github/vmchale/madlang?svg=true)](https://ci.appveyor.com/project/vmchale/madlang)
 [![Build Status](https://travis-ci.org/vmchale/madlang.svg?branch=master)](https://travis-ci.org/vmchale/madlang)
 
 This is the Madlang DSL for generating text. You specify a template, and Madlang
diff --git a/cabal.project.local b/cabal.project.local
--- a/cabal.project.local
+++ b/cabal.project.local
@@ -1,3 +1,3 @@
 with-compiler: ghc-8.2.1
 optimization: 2
-constraints: madlang +development
+constraints: madlang +development +llvm-fast
diff --git a/madlang.cabal b/madlang.cabal
--- a/madlang.cabal
+++ b/madlang.cabal
@@ -1,5 +1,5 @@
 name:                madlang
-version:             2.4.2.3
+version:             2.4.2.4
 synopsis:            Randomized templating language DSL
 description:         Madlang is a text templating language written in Haskell,
                      meant to explore computational creativity and generative