Make: Enable Deno to run pre-builds

Author: ashvardanian

.github/workflows/prerelease.yml

@@ -140,6 +140,9 @@ jobs:
     env:
       CC: gcc-12
       CXX: g++-12
+      # `node-gyp-build` will look at this first; setting it prevents an
+      # unintended rebuild and lets Deno just `dlopen` the prebuilt `.node`.
+      PREBUILDS_ONLY: "1"
 
     steps:
       - name: Checkout
@@ -167,8 +170,16 @@ jobs:
         with:
           deno-version: vx.x.x
 
+      # --allow-env  : `node-gyp-build` pokes at `process.env`
+      # --allow-ffi  : Deno needs this to `dlopen` the `.node` addon
+      # --unstable   : Node-API/FFI loader still gated under this flag
       - name: Test with Deno
-        run: deno test --allow-read
+        run: >
+          deno test
+          --allow-read
+          --allow-env=PREBUILDS_ONLY,npm_config_runtime,npm_config_target
+          --allow-ffi
+          --unstable
 
   test_rust:
     name: Test Rust