diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..faecebbf
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "prelude"]
+	path = prelude
+	url = https://github.com/facebook/buck2-prelude.git
diff --git a/README-BUCK.md b/README-BUCK.md
index 7159e552..5c09e3c5 100644
--- a/README-BUCK.md
+++ b/README-BUCK.md
@@ -21,15 +21,8 @@ Instructions on how to setup a Buck2 build of ocamlrep. More Buck2 information &
 - Initialize a Buck2 prelude Git submodule.
 
      ```bash
-     git submodule add https://github.com/facebook/buck2-prelude.git prelude
      git submodule update --init
      ```
-- Checkout the prelude at the right commit.
-
-     ```bash
-     prelude_hash=$(curl https://github.com/facebook/buck2/releases/download/latest/prelude_hash)
-     (cd prelude && git checkout $prelude_hash)
-     ```
 
 ### Reindeer
 [Reindeer](https://github.com/facebookincubator/reindeer) is a tool to generate Buck2 rules for Rust crates.
diff --git a/prelude b/prelude
new file mode 160000
index 00000000..b8851f1b
--- /dev/null
+++ b/prelude
@@ -0,0 +1 @@
+Subproject commit b8851f1bf8f877b43cae97213f048d6e63394eef