diff --git a/examples/folio/sanderling/package-lock.json b/examples/folio/sanderling/package-lock.json
index 5c02caa..578a933 100644
--- a/examples/folio/sanderling/package-lock.json
+++ b/examples/folio/sanderling/package-lock.json
@@ -6,15 +6,23 @@
     "": {
       "name": "folio",
       "devDependencies": {
-        "@sanderling/spec": "^0.0.1-rc4"
+        "@sanderling/spec": "file:../../../pkg/spec"
+      }
+    },
+    "../../../pkg/spec": {
+      "name": "@sanderling/spec",
+      "version": "0.0.0-dev",
+      "dev": true,
+      "license": "Apache-2.0",
+      "devDependencies": {
+        "@types/node": "^22.7.5",
+        "tsx": "^4.21.0",
+        "typescript": "^5.9.3"
       }
     },
     "node_modules/@sanderling/spec": {
-      "version": "0.0.1-rc4",
-      "resolved": "https://registry.npmjs.org/@sanderling/spec/-/spec-0.0.1-rc4.tgz",
-      "integrity": "sha512-iv08d2duxQMowqEnDtOeWRGLmiv7188D68g/5ei+cU1BL33cVXwGscLYznfsUv4PgK7XI5Vihwbnp7ME4+Lh1w==",
-      "dev": true,
-      "license": "Apache-2.0"
+      "resolved": "../../../pkg/spec",
+      "link": true
     }
   }
 }
diff --git a/examples/folio/sanderling/package.json b/examples/folio/sanderling/package.json
index 5325120..73c9a4a 100644
--- a/examples/folio/sanderling/package.json
+++ b/examples/folio/sanderling/package.json
@@ -3,6 +3,6 @@
   "private": true,
   "description": "Minimal sanderling integration example.",
   "devDependencies": {
-    "@sanderling/spec": "^0.0.1-rc4"
+    "@sanderling/spec": "file:../../../pkg/spec"
   }
 }