don't write manifest if we don't need to

src/tarballs/bin.ts

@@ -37,7 +37,7 @@ if exist "%~dp0..\\bin\\node.exe" (
     // `)
   }
   const writeUnix = async () => {
-    const bin = path.join(baseWorkspace, 'bin', config.bin)
+    const bin = qq.join([baseWorkspace, 'bin', config.bin])
     await fs.writeFile(bin, `#!/usr/bin/env bash
 set -e
 echoerr() { echo "$@" 1>&2; }

src/tarballs/build.ts

@@ -68,7 +68,7 @@ async function doBuild(c: IConfig, options: {
     await tar.x({
       file: tarball,
       stripComponents: 1,
-      cwd: c.workspace()
+      cwd: c.workspace(),
     })
     await qq.mkdirp(path.dirname(baseTarballPath))
     await qq.mv(tarball, baseTarballPath)
@@ -109,20 +109,27 @@ async function doBuild(c: IConfig, options: {
     const nodePath = targetNodeLocation(target, c)
     const workspaceParent = path.dirname(workspace)
 
-    log(`building target ${base}`)
-    if (xz) {
-      const baseXZ = base.replace('.tar.gz', '.tar.xz')
-      log(`building target ${baseXZ}`)
-    }
-
     await qq.cp(baseTarballPath, tarballDist)
-
     await tar.replace({
       file: tarballDist,
       cwd: workspaceParent,
     }, [path.relative(workspaceParent, nodePath)])
 
-    if (options.pack === false) return
+    if (options.pack === false) {
+      await tar.x({
+        file: tarballDist,
+        cwd: workspace,
+        stripComponents: 1,
+      })
+      return
+    }
+
+    log(`building target ${base}`)
+    if (xz) {
+      const baseXZ = base.replace('.tar.gz', '.tar.xz')
+      log(`building target ${baseXZ}`)
+    }
+
     await compress(tarballDist, xz)
     if (!c.updateConfig.s3.host) return
     await writeManifest(target, c, config, xz)
@@ -159,7 +166,6 @@ async function doBuild(c: IConfig, options: {
   await addDependencies()
   await writeBinScripts({config, baseWorkspace: c.workspace(), nodeVersion: c.nodeVersion})
   await buildBaseTarball()
-  await writeManifest(undefined, c, config, xz)
   await downloadNodeBinaries(c)
   const targetsToBuild =
     options.platform ?