test(cli): isolate Bun define cache (#46536)

Co-authored-by: rekram1-node <63023139+rekram1-node@users.noreply.github.com>

packages/cli/test/updater-install.test.ts

@@ -198,7 +198,13 @@ test("Node distribution honors the compile-time CLI name", async () => {
       "--test-name-pattern",
       "^Node distribution resolves the published npm package$",
     ],
-    { cwd: path.join(import.meta.dir, ".."), stdout: "ignore", stderr: "pipe" },
+    {
+      cwd: path.join(import.meta.dir, ".."),
+      stdout: "ignore",
+      stderr: "pipe",
+      // Bun 1.4 can reuse cached modules compiled with different --define values.
+      env: { ...process.env, BUN_RUNTIME_TRANSPILER_CACHE_PATH: "0" },
+    },
   )
   const [code, stderr] = await Promise.all([child.exited, new Response(child.stderr).text()])
   expect(code, stderr).toBe(0)