reasonml · anmonteiro · Aug 9, 2026 · Aug 9, 2026 · Aug 9, 2026
diff --git a/.github/workflows/nix-build.yml b/.github/workflows/nix-build.yml
@@ -26,6 +26,7 @@ jobs:
           - 5_3
           - 5_4
           - 5_5
+          - 5_6
         include:
           - {ocaml-version: 5_5, os: ubuntu-26.04-arm}
 
@@ -52,6 +53,7 @@ jobs:
           - {ocaml-version: '5_3', os: macos-latest}
           - {ocaml-version: '5_4', os: macos-latest}
           - {ocaml-version: '5_5', os: macos-latest}
+          - {ocaml-version: '5_6', os: macos-latest}
     runs-on: ${{ matrix.setup.os }}
     steps:
     - uses: actions/checkout@v7

diff --git a/dune-project b/dune-project
@@ -38,7 +38,7 @@
   (ocaml
    (and
     (>= "4.08")
-    (< "5.6")))
+    (< "5.7")))
   (ocamlfind :build)
   (cmdliner
    (>= "1.1.0"))
@@ -62,7 +62,7 @@
   (ocaml
    (and
     (>= "4.08")
-    (< "5.6")))
+    (< "5.7")))
   (reason
    (= :version))
   (utop

diff --git a/flake.lock b/flake.lock
diff --git a/flake.nix b/flake.nix
@@ -13,7 +13,7 @@
           let
             pkgs = nixpkgs.legacyPackages.${system}.extend (
               self: super: {
-                ocamlPackages = super.ocaml-ng.ocamlPackages_5_5;
+                ocamlPackages = super.ocaml-ng.ocamlPackages_5_6;
               }
             );
           in
@@ -38,6 +38,7 @@
         };
         release = pkgs.callPackage ./nix/shell.nix {
           reason = self.packages.${pkgs.stdenv.hostPlatform.system}.default;
+          dune-release = pkgs.ocaml-ng.ocamlPackages_5_5.dune-release;
           release-mode = true;
         };
       });

diff --git a/nix/ci.nix b/nix/ci.nix
@@ -9,8 +9,13 @@ let
         inherit (lock.nodes.nixpkgs.locked) rev;
         allRefs = true;
       };
+      basePkgs = import src { };
     in
-    import src { };
+    basePkgs.extend (
+      _self: super: {
+        ocamlPackages = super.ocaml-ng."ocamlPackages_${ocamlVersion}";
+      }
+    );
 in
 
 pkgs.callPackage ./. { doCheck = true; }
diff --git a/nix/shell.nix b/nix/shell.nix
@@ -5,6 +5,7 @@
   cacert,
   curl,
   git,
+  dune-release ? ocamlPackages.dune-release,
   release-mode ? false,
 }:
 

diff --git a/reason.opam b/reason.opam
@@ -16,7 +16,7 @@ homepage: "https://reasonml.github.io/"
 bug-reports: "https://github.com/reasonml/reason/issues"
 depends: [
   "dune" {>= "3.18"}
-  "ocaml" {>= "4.08" & < "5.6"}
+  "ocaml" {>= "4.08" & < "5.7"}
   "ocamlfind" {build}
   "cmdliner" {>= "1.1.0"}
   "dune-build-info" {>= "2.9.3"}

diff --git a/rtop.opam b/rtop.opam
@@ -14,7 +14,7 @@ homepage: "https://reasonml.github.io/"
 bug-reports: "https://github.com/reasonml/reason/issues"
 depends: [
   "dune" {>= "3.18"}
-  "ocaml" {>= "4.08" & < "5.6"}
+  "ocaml" {>= "4.08" & < "5.7"}
   "reason" {= version}
   "utop" {>= "2.0"}
   "cppo"
-Original file line number
+Diff line change
@@ Expand Up / @@ -5,6 +5,7 @@ @@
       cacert,
       curl,
       git,
+      dune-release ? ocamlPackages.dune-release,
       release-mode ? false,
     }:
@@ Expand Down @@