diff --git a/CHANGELOG.md b/CHANGELOG.md
index e045f2b0..684da859 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [unreleased]
 
+### Fixed
+
+- Force post-process exit with `process.exit`.
+
 ## [2.1.1]
 
 ### Changed
diff --git a/dist/post/index.js b/dist/post/index.js
index 65e55eee..a70830ce 100644
--- a/dist/post/index.js
+++ b/dist/post/index.js
@@ -125874,14 +125874,14 @@ __nccwpck_require__.d(forms_namespaceObject, {
   "serializeArray": () => (serializeArray)
 });
 
+;// CONCATENATED MODULE: external "node:process"
+const external_node_process_namespaceObject = require("node:process");
 // EXTERNAL MODULE: ../../node_modules/@actions/core/lib/core.js
 var lib_core = __nccwpck_require__(37117);
 ;// CONCATENATED MODULE: external "node:os"
 const external_node_os_namespaceObject = require("node:os");
 ;// CONCATENATED MODULE: external "node:path"
 const external_node_path_namespaceObject = require("node:path");
-;// CONCATENATED MODULE: external "node:process"
-const external_node_process_namespaceObject = require("node:process");
 // EXTERNAL MODULE: ../../node_modules/@actions/cache/lib/cache.js
 var lib_cache = __nccwpck_require__(86930);
 // EXTERNAL MODULE: ../../node_modules/@actions/exec/lib/exec.js
@@ -144052,6 +144052,8 @@ async function trimDuneCache() {
 }
 
 ;// CONCATENATED MODULE: ./src/post.ts
+/* eslint-disable unicorn/no-process-exit */
+
 
 
 
@@ -144063,11 +144065,13 @@ async function run() {
             await saveDuneCache();
         }
         await saveOpamDownloadCache();
+        external_node_process_namespaceObject.exit(0);
     }
     catch (error) {
         if (error instanceof Error) {
             lib_core.error(error.message);
         }
+        external_node_process_namespaceObject.exit(1);
     }
 }
 void run();
diff --git a/packages/setup-ocaml/src/post.ts b/packages/setup-ocaml/src/post.ts
index 4461d720..354795f9 100644
--- a/packages/setup-ocaml/src/post.ts
+++ b/packages/setup-ocaml/src/post.ts
@@ -1,3 +1,6 @@
+/* eslint-disable unicorn/no-process-exit */
+import * as process from "node:process";
+
 import * as core from "@actions/core";
 
 import { saveDuneCache, saveOpamDownloadCache } from "./cache";
@@ -11,10 +14,12 @@ async function run() {
       await saveDuneCache();
     }
     await saveOpamDownloadCache();
+    process.exit(0);
   } catch (error) {
     if (error instanceof Error) {
       core.error(error.message);
     }
+    process.exit(1);
   }
 }