diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4ea05d4a..9270b56e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -121,7 +121,7 @@ jobs:
   build-alpine:
     name: Alpine Linux
     runs-on: ubuntu-latest
-    container: alpine:3.19
+    container: alpine:3.21
     strategy:
       fail-fast: false
       matrix:
@@ -130,7 +130,7 @@ jobs:
       BUILDTYPE: ${{ matrix.buildType }}
     steps:
     - name: Prepare
-      run: apk add git build-base cmake curl-dev autoconf automake libtool texinfo linux-headers --update-cache
+      run: apk add git build-base cmake curl-dev autoconf automake libtool texinfo linux-headers libffi-dev --update-cache
     - uses: actions/checkout@v4
       with:
         submodules: true
@@ -138,7 +138,7 @@ jobs:
       with:
         node-version-file: '.nvmrc'
     - name: Build it
-      run: make VERBOSE=1
+      run: make VERBOSE=1 USE_EXTERNAL_FFI=ON
     - name: Test it
       run: make test
   build-windows:
diff --git a/src/curl-utils.c b/src/curl-utils.c
index f4bf8fe6..ac5b9f87 100644
--- a/src/curl-utils.c
+++ b/src/curl-utils.c
@@ -165,11 +165,15 @@ static void uv__poll_cb(uv_poll_t *handle, int status, int events) {
     CHECK_NOT_NULL(qrt);
 
     int flags = 0;
-    if (events & UV_READABLE) {
-        flags |= CURL_CSELECT_IN;
-    }
-    if (events & UV_WRITABLE) {
-        flags |= CURL_CSELECT_OUT;
+    if (status != 0) {
+        flags |= CURL_CSELECT_ERR;
+    } else {
+        if (events & UV_READABLE) {
+            flags |= CURL_CSELECT_IN;
+        }
+        if (events & UV_WRITABLE) {
+            flags |= CURL_CSELECT_OUT;
+        }
     }
 
     int running_handles;
@@ -197,12 +201,11 @@ static int curl__handle_socket(CURL *easy, curl_socket_t s, int action, void *us
                 poll_ctx->qrt = qrt;
                 poll_ctx->sockfd = s;
                 poll_ctx->poll.data = poll_ctx;
+                curl_multi_assign(qrt->curl_ctx.curlm_h, s, (void *) poll_ctx);
             } else {
                 poll_ctx = socketp;
             }
 
-            curl_multi_assign(qrt->curl_ctx.curlm_h, s, (void *) poll_ctx);
-
             int events = 0;
             if (action != CURL_POLL_IN) {
                 events |= UV_WRITABLE;
@@ -222,8 +225,8 @@ static int curl__handle_socket(CURL *easy, curl_socket_t s, int action, void *us
                 uv_close((uv_handle_t *) &poll_ctx->poll, uv__poll_close_cb);
             }
             break;
-        default:
-            abort();
+        case CURL_POLL_NONE:
+            break;
     }
 
     return 0;
diff --git a/src/vm.c b/src/vm.c
index 4e27c170..151347f8 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -350,6 +350,16 @@ void TJS_FreeRuntime(TJSRuntime *qrt) {
     JS_FreeContext(qrt->ctx);
     JS_FreeRuntime(qrt->rt);
 
+    /* Destroy CURLM handle. */
+    if (qrt->curl_ctx.curlm_h) {
+        curl_multi_cleanup(qrt->curl_ctx.curlm_h);
+        qrt->curl_ctx.curlm_h = NULL;
+    }
+
+    /* Destroy WASM runtime. */
+    m3_FreeEnvironment(qrt->wasm_ctx.env);
+    qrt->wasm_ctx.env = NULL;
+
     /* Cleanup loop. All handles should be closed. */
     int closed = 0;
     for (int i = 0; i < 5; i++) {
@@ -368,16 +378,6 @@ void TJS_FreeRuntime(TJSRuntime *qrt) {
     (void) closed;
 #endif
 
-    /* Destroy CURLM handle. */
-    if (qrt->curl_ctx.curlm_h) {
-        curl_multi_cleanup(qrt->curl_ctx.curlm_h);
-        qrt->curl_ctx.curlm_h = NULL;
-    }
-
-    /* Destroy WASM runtime. */
-    m3_FreeEnvironment(qrt->wasm_ctx.env);
-    qrt->wasm_ctx.env = NULL;
-
     tjs__free(qrt);
 }