diff --git a/Formula/smlsharp.rb b/Formula/smlsharp.rb
index 53dc948..56af1ae 100644
--- a/Formula/smlsharp.rb
+++ b/Formula/smlsharp.rb
@@ -5,23 +5,31 @@ class Smlsharp < Formula
   sha256 "0b44fb1f369f7cfced197c68f0d3102e940dbe5288adc3bdf618a5a3ec3165db"
   version "4.0.0"
   license "MIT"
-  revision 1
+  revision 2
 
   bottle do
     root_url "https://github.com/smlsharp/repos/raw/main/homebrew"
-    sha256 big_sur: "39998a174c53d856b267e531645c0dc81337991af181e60efe4be6a4e253b6e3"
+    sha256 big_sur: "5a71f04d57ac27cece90983cb041a5bdd9ae6aca2612da0bd5137317d1490bd5"
   end
 
-  depends_on "llvm@11"
+  depends_on "llvm@12"
   depends_on "massivethreads"
   depends_on "gmp"
   depends_on "xz" => :build
 
   def install
-    opt_llvm = Formula["llvm@11"].opt_prefix
+    opt_llvm = Formula["llvm@12"].opt_prefix.sub(/llvm\z/, "llvm@12")
+    opt_llvm_bin = opt_llvm/"bin"
     system "./configure", "--prefix=#{prefix}", "--with-llvm=#{opt_llvm}"
     system "make", "stage"
     system "make", "all"
+    inreplace "src/config.mk" do |s|
+      s.sub! /^LLC =.*$/, "LLC = #{opt_llvm_bin}/llc"
+      s.sub! /^OPT =.*$/, "OPT = #{opt_llvm_bin}/opt"
+      s.sub! /^LLVM_AS =.*$/, "LLVM_AS = #{opt_llvm_bin}/llvm-as"
+      s.sub! /^LLVM_DIS =.*$/, "LLVM_DIS = #{opt_llvm_bin}/llvm-dis"
+    end
+    system "make", "-t"
     system "make", "install"
   end