npm run build

lib/util.js

@@ -823,10 +823,11 @@ async function checkDiskUsage(logger) {
             return undefined;
         }
         const diskUsage = await (0, check_disk_space_1.default)(getRequiredEnvParam("GITHUB_WORKSPACE"));
+        const mbInBytes = 1024 * 1024;
         const gbInBytes = 1024 * 1024 * 1024;
         if (diskUsage.free < 2 * gbInBytes) {
             const message = "The Actions runner is running low on disk space " +
-                `(${(diskUsage.free / gbInBytes).toPrecision(4)} GB available).`;
+                `(${(diskUsage.free / mbInBytes).toPrecision(4)} MB available).`;
             if (process.env[environment_1.EnvVar.HAS_WARNED_ABOUT_DISK_SPACE] !== "true") {
                 logger.warning(message);
             }