diff --git a/scripts/rollup/build-all-release-channels.js b/scripts/rollup/build-all-release-channels.js
index 9c5951d5264c0..2dac6f7954d3f 100644
--- a/scripts/rollup/build-all-release-channels.js
+++ b/scripts/rollup/build-all-release-channels.js
@@ -80,61 +80,63 @@ const argv = yargs.wrap(yargs.terminalWidth()).options({
   },
 }).argv;
 
-if (argv.ci === 'github') {
-  // ./scripts/rollup/build was being used by spawning a new process and passing via ENV variables
-  // so let's just preserve this for now and rewrite it later to just take a function arg
-  process.env.RELEASE_CHANNEL = argv.releaseChannel;
-  buildEverything(argv.bundleType);
-  switch (argv.releaseChannel) {
-    case 'stable': {
-      processStable('./build');
-      break;
+async function main() {
+  if (argv.ci === 'github') {
+    // ./scripts/rollup/build was being used by spawning a new process and passing via ENV variables
+    // so let's just preserve this for now and rewrite it later to just take a function arg
+    process.env.RELEASE_CHANNEL = argv.releaseChannel;
+    await buildEverything(argv.bundleType);
+    switch (argv.releaseChannel) {
+      case 'stable': {
+        processStable('./build');
+        break;
+      }
+      case 'experimental': {
+        processExperimental('./build');
+        break;
+      }
+      default:
+        throw new Error(`Unknown release channel ${argv.releaseChannel}`);
     }
-    case 'experimental': {
+  } else if (argv.ci === 'circleci') {
+    // In CI, we use multiple concurrent processes. Allocate half the processes to
+    // build the stable channel, and the other half for experimental. Override
+    // the environment variables to "trick" the underlying build script.
+    const total = parseInt(process.env.CIRCLE_NODE_TOTAL, 10);
+    const halfTotal = Math.floor(total / 2);
+    const index = parseInt(process.env.CIRCLE_NODE_INDEX, 10);
+    if (index < halfTotal) {
+      const nodeTotal = halfTotal;
+      const nodeIndex = index;
+      buildForChannel('stable', nodeTotal, nodeIndex);
+      processStable('./build');
+    } else {
+      const nodeTotal = total - halfTotal;
+      const nodeIndex = index - halfTotal;
+      buildForChannel('experimental', nodeTotal, nodeIndex);
       processExperimental('./build');
-      break;
     }
-    default:
-      throw new Error(`Unknown release channel ${argv.releaseChannel}`);
-  }
-} else if (argv.ci === 'circleci') {
-  // In CI, we use multiple concurrent processes. Allocate half the processes to
-  // build the stable channel, and the other half for experimental. Override
-  // the environment variables to "trick" the underlying build script.
-  const total = parseInt(process.env.CIRCLE_NODE_TOTAL, 10);
-  const halfTotal = Math.floor(total / 2);
-  const index = parseInt(process.env.CIRCLE_NODE_INDEX, 10);
-  if (index < halfTotal) {
-    const nodeTotal = halfTotal;
-    const nodeIndex = index;
-    buildForChannel('stable', nodeTotal, nodeIndex);
-    processStable('./build');
   } else {
-    const nodeTotal = total - halfTotal;
-    const nodeIndex = index - halfTotal;
-    buildForChannel('experimental', nodeTotal, nodeIndex);
-    processExperimental('./build');
+    // Running locally, no concurrency. Move each channel's build artifacts into
+    // a temporary directory so that they don't conflict.
+    buildForChannel('stable', '', '');
+    const stableDir = tmp.dirSync().name;
+    crossDeviceRenameSync('./build', stableDir);
+    processStable(stableDir);
+    buildForChannel('experimental', '', '');
+    const experimentalDir = tmp.dirSync().name;
+    crossDeviceRenameSync('./build', experimentalDir);
+    processExperimental(experimentalDir);
+
+    // Then merge the experimental folder into the stable one. processExperimental
+    // will have already removed conflicting files.
+    //
+    // In CI, merging is handled automatically by CircleCI's workspace feature.
+    mergeDirsSync(experimentalDir + '/', stableDir + '/');
+
+    // Now restore the combined directory back to its original name
+    crossDeviceRenameSync(stableDir, './build');
   }
-} else {
-  // Running locally, no concurrency. Move each channel's build artifacts into
-  // a temporary directory so that they don't conflict.
-  buildForChannel('stable', '', '');
-  const stableDir = tmp.dirSync().name;
-  crossDeviceRenameSync('./build', stableDir);
-  processStable(stableDir);
-  buildForChannel('experimental', '', '');
-  const experimentalDir = tmp.dirSync().name;
-  crossDeviceRenameSync('./build', experimentalDir);
-  processExperimental(experimentalDir);
-
-  // Then merge the experimental folder into the stable one. processExperimental
-  // will have already removed conflicting files.
-  //
-  // In CI, merging is handled automatically by CircleCI's workspace feature.
-  mergeDirsSync(experimentalDir + '/', stableDir + '/');
-
-  // Now restore the combined directory back to its original name
-  crossDeviceRenameSync(stableDir, './build');
 }
 
 function buildForChannel(channel, nodeTotal, nodeIndex) {
@@ -501,3 +503,5 @@ function mergeDirsSync(source, destination) {
     }
   }
 }
+
+main();