diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index cce5fd2..ab72dbc 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,6 +21,7 @@ jobs:
           ocaml-version: ${{ matrix.ocaml-version }}
 
       - name: Use Node.js 12.x
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         uses: actions/setup-node@v1
         with:
           node-version: 12.x
@@ -35,7 +36,7 @@ jobs:
         run: opam depext -yt spin
 
       - name: Install dependencies
-        run: make dev
+        run: opam install --deps-only -y .
           
       - name: Substitute watermarks
         run: opam exec -- dune subst
@@ -58,7 +59,7 @@ jobs:
         uses: actions/upload-artifact@master
         with:
           name: ${{ matrix.os }}
-          path: _build/install/default/bin/spin
+          path: _build/default/bin/main.exe
 
   publish:
     needs: build
diff --git a/script/release-postinstall.js b/script/release-postinstall.js
index 8a29c06..d010210 100644
--- a/script/release-postinstall.js
+++ b/script/release-postinstall.js
@@ -6,9 +6,7 @@ const fs = require("fs");
 
 const platform = process.platform;
 
-const binariesToCopy = [
-  "spin"
-];
+const binaryName = "main.exe";
 
 function find_arch() {
   // The running binary is 64-bit, so the OS is clearly 64-bit.
@@ -57,18 +55,16 @@ function copyFileSync(sourcePath, destPath) {
   fs.chmodSync(destPath, stat.mode);
 }
 
-const copyPlatformBinaries = platformPath => {
+const copyPlatformBinary = platformPath => {
   const platformBuildPath = path.join(__dirname, platformPath);
 
-  binariesToCopy.forEach(binaryPath => {
-    const sourcePath = path.join(platformBuildPath, binaryPath);
-    const destPath = path.join(__dirname, binaryPath);
-    if (fs.existsSync(destPath)) {
-      fs.unlinkSync(destPath);
-    }
-    copyFileSync(sourcePath, destPath);
-    fs.chmodSync(destPath, 0o755);
-  });
+  const sourcePath = path.join(platformBuildPath, binaryName);
+  const destPath = path.join(__dirname, "spin");
+  if (fs.existsSync(destPath)) {
+    fs.unlinkSync(destPath);
+  }
+  copyFileSync(sourcePath, destPath);
+  fs.chmodSync(destPath, 0o755);
 };
 
 const arch = find_arch();
@@ -86,4 +82,4 @@ if (!supported) {
   process.exit(1);
 }
 
-copyPlatformBinaries(platformPath);
+copyPlatformBinary(platformPath);