diff --git a/apps/api/src/cutover-orchestrator.ts b/apps/api/src/cutover-orchestrator.ts
index 361d462..1b55f97 100644
--- a/apps/api/src/cutover-orchestrator.ts
+++ b/apps/api/src/cutover-orchestrator.ts
@@ -21,7 +21,9 @@ import { PRODUCTION_CUTOVER_ACK } from './canary-runtime.js';
 const STATE_VERSION = 1;
 const STATE_FILE = 'cutover-state.json';
 const GATEWAY_ARGV = [
-  resolve(process.cwd(), 'apps/api/node_modules/.bin/tsx'),
+  process.execPath,
+  '--import',
+  resolve(process.cwd(), 'node_modules/.pnpm/tsx@4.22.4/node_modules/tsx/dist/loader.mjs'),
   resolve(process.cwd(), 'apps/api/src/production-gateway-cli.ts'),
 ] as const;
 const DIGEST = /^[a-f0-9]{64}$/u;
diff --git a/apps/api/src/production-gateway.test.ts b/apps/api/src/production-gateway.test.ts
index 2aa82a7..7badb97 100644
--- a/apps/api/src/production-gateway.test.ts
+++ b/apps/api/src/production-gateway.test.ts
@@ -144,7 +144,9 @@ describe('cutover validation and reversible orchestration', () => {
     expect(signals).toEqual([41, 42]);
     expect(starts.map((start) => start.argv)).toEqual([
       [
-        resolve(process.cwd(), 'apps/api/node_modules/.bin/tsx'),
+        process.execPath,
+        '--import',
+        resolve(process.cwd(), 'node_modules/.pnpm/tsx@4.22.4/node_modules/tsx/dist/loader.mjs'),
         resolve(process.cwd(), 'apps/api/src/production-gateway-cli.ts'),
       ],
       ['/usr/bin/true', 'legacy'],