diff --git a/dist/index.js b/dist/index.js
index db391465..6cb338ee 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -138068,6 +138068,7 @@ const CYGWIN_MIRROR_ENCODED_URI = encodeURIComponent(CYGWIN_MIRROR).toLowerCase(
 // [HACK] https://github.com/ocaml/setup-ocaml/pull/55
 const CYGWIN_ROOT = external_node_path_namespaceObject.join("D:", "cygwin");
 const CYGWIN_ROOT_BIN = external_node_path_namespaceObject.join(CYGWIN_ROOT, "bin");
+const CYGWIN_ROOT_MINGW_BIN = external_node_path_namespaceObject.join(CYGWIN_ROOT, "usr", "x86_64-w64-mingw32", "bin");
 const DUNE_CACHE_ROOT = (() => {
     const homeDir = external_node_os_.homedir();
     if (PLATFORM === "windows") {
@@ -157245,6 +157246,7 @@ async function installer() {
             await saveCygwinCache();
         }
         lib_core.addPath(CYGWIN_ROOT_BIN);
+        lib_core.addPath(CYGWIN_ROOT_MINGW_BIN);
     }
     await setupOpam();
     await repositoryRemoveAll();
diff --git a/dist/post/index.js b/dist/post/index.js
index 98316153..ef93686d 100644
--- a/dist/post/index.js
+++ b/dist/post/index.js
@@ -103597,6 +103597,7 @@ const constants_CYGWIN_MIRROR_ENCODED_URI = encodeURIComponent(CYGWIN_MIRROR).to
 // [HACK] https://github.com/ocaml/setup-ocaml/pull/55
 const constants_CYGWIN_ROOT = external_node_path_namespaceObject.join("D:", "cygwin");
 const CYGWIN_ROOT_BIN = external_node_path_namespaceObject.join(constants_CYGWIN_ROOT, "bin");
+const CYGWIN_ROOT_MINGW_BIN = external_node_path_namespaceObject.join(constants_CYGWIN_ROOT, "usr", "x86_64-w64-mingw32", "bin");
 const DUNE_CACHE_ROOT = (() => {
     const homeDir = external_node_os_.homedir();
     if (constants_PLATFORM === "windows") {
diff --git a/packages/setup-ocaml/src/constants.ts b/packages/setup-ocaml/src/constants.ts
index 3886f9cb..f1403c76 100644
--- a/packages/setup-ocaml/src/constants.ts
+++ b/packages/setup-ocaml/src/constants.ts
@@ -60,6 +60,13 @@ export const CYGWIN_ROOT = path.join("D:", "cygwin");
 
 export const CYGWIN_ROOT_BIN = path.join(CYGWIN_ROOT, "bin");
 
+export const CYGWIN_ROOT_MINGW_BIN = path.join(
+  CYGWIN_ROOT,
+  "usr",
+  "x86_64-w64-mingw32",
+  "bin",
+);
+
 export const DUNE_CACHE_ROOT = (() => {
   const homeDir = os.homedir();
   if (PLATFORM === "windows") {
diff --git a/packages/setup-ocaml/src/installer.ts b/packages/setup-ocaml/src/installer.ts
index 9f38d94a..29759fa2 100644
--- a/packages/setup-ocaml/src/installer.ts
+++ b/packages/setup-ocaml/src/installer.ts
@@ -10,6 +10,7 @@ import {
 } from "./cache.js";
 import {
   CYGWIN_ROOT_BIN,
+  CYGWIN_ROOT_MINGW_BIN,
   DUNE_CACHE,
   DUNE_CACHE_ROOT,
   OPAM_PIN,
@@ -67,6 +68,7 @@ export async function installer() {
       await saveCygwinCache();
     }
     core.addPath(CYGWIN_ROOT_BIN);
+    core.addPath(CYGWIN_ROOT_MINGW_BIN);
   }
   await setupOpam();
   await repositoryRemoveAll();