diff --git a/src/stores/data.mjs b/src/stores/data.mjs
index 595cd85..4946080 100644
--- a/src/stores/data.mjs
+++ b/src/stores/data.mjs
@@ -6,8 +6,8 @@ import { getEmptyPreviewData, usePagePreviewStore } from './pagePreview.mjs';
 function defineEndpointStore(id, endpoint, transform = null) {
   return defineStore(`data/${id}`, () => {
     const loadedData = shallowRef(null);
-    const preview = import.meta.env.DEV ? usePagePreviewStore() : null;
-    const data = import.meta.env.DEV
+    const preview = import.meta.env?.DEV ? usePagePreviewStore() : null;
+    const data = import.meta.env?.DEV
       ? computed(() => preview.mode === 'empty' ? getEmptyPreviewData(id) : loadedData.value)
       : loadedData;
     const isUpdating = ref(false);
diff --git a/src/stores/data.node.test.mjs b/src/stores/data.node.test.mjs
new file mode 100644
index 0000000..bb4b72e
--- /dev/null
+++ b/src/stores/data.node.test.mjs
@@ -0,0 +1,20 @@
+import { execFileSync } from 'node:child_process';
+import { describe, expect, it } from 'vitest';
+
+describe('data stores in Node', () => {
+  it('initializes shared stores without Vite', () => {
+    const script = `
+      import { createPinia, setActivePinia } from 'pinia';
+      import { useDataStore } from './src/stores/data.mjs';
+
+      setActivePinia(createPinia());
+      useDataStore();
+    `;
+
+    expect(() => execFileSync(process.execPath, [
+      '--input-type=module',
+      '--eval',
+      script,
+    ], { cwd: process.cwd(), stdio: 'pipe' })).not.toThrow();
+  });
+});
diff --git a/src/stores/pagePreview.mjs b/src/stores/pagePreview.mjs
index 70a43c6..937ab30 100644
--- a/src/stores/pagePreview.mjs
+++ b/src/stores/pagePreview.mjs
@@ -1,6 +1,6 @@
 import { defineStore } from 'pinia';
 
-export const usePagePreviewStore = import.meta.env.DEV
+export const usePagePreviewStore = import.meta.env?.DEV
   ? defineStore('debug/pagePreview', {
     state: () => ({ mode: 'live' }),
   })