rescript-lang · cristianoc · Aug 10, 2026 · Aug 10, 2026
diff --git a/.ocamlformat-ignore b/.ocamlformat-ignore
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -37,6 +37,7 @@
 - Replace `-bs-diagnose` with `-debug-ir` and make IR diagnostic artifacts deterministic, compilation-local, and easy to clean. https://github.com/rescript-lang/rescript/pull/8535
 - Replace CPPO-based browser conditionals with Dune-selected native and playground compiler implementations. https://github.com/rescript-lang/rescript/pull/8541
 - Replace compiler data-structure CPPO specializations with OCaml functors. https://github.com/rescript-lang/rescript/pull/8542
+- Remove the obsolete CPPO generator for frozen Belt runtime specializations. https://github.com/rescript-lang/rescript/pull/8543
 
 # 13.0.0-alpha.5
 

diff --git a/dune-project b/dune-project
@@ -21,9 +21,6 @@
   (ocaml
    (>= 5.0.0))
   dune
-  ; Used by packages/@rescript/runtime/scripts/cppo.js to regenerate checked-in ReScript sources.
-  (cppo
-   (= 1.8.0))
   (flow_parser
    (= 0.267.0))
   (ocamlformat

diff --git a/packages/@rescript/runtime/cppo/belt_Set.res.cppo b/packages/@rescript/runtime/cppo/belt_Set.res.cppo