diff --git a/tools/license2rtf.mjs b/tools/license2rtf.mjs
index 4cdca33b60995e..d982e679c3e653 100644
--- a/tools/license2rtf.mjs
+++ b/tools/license2rtf.mjs
@@ -27,6 +27,7 @@ class LineSplitter extends Stream {
     if (this.buffer) {
       this.emit('data', this.buffer);
     }
+    this.writable = false;
     this.emit('end');
   }
 }
@@ -52,6 +53,7 @@ class ParagraphParser extends Stream {
     if (data)
       this.parseLine(data + '');
     this.flushParagraph();
+    this.writable = false;
     this.emit('end');
   }
 
@@ -211,6 +213,7 @@ class Unwrapper extends Stream {
   end(data) {
     if (data)
       this.write(data);
+    this.writable = false;
     this.emit('end');
   }
 }
@@ -272,6 +275,7 @@ class RtfGenerator extends Stream {
       this.write(data);
     if (this.didWriteAnything)
       this.emitFooter();
+    this.writable = false;
     this.emit('end');
   }
 
@@ -289,15 +293,11 @@ class RtfGenerator extends Stream {
 stdin.setEncoding('utf-8');
 stdin.resume();
 
-async function main() {
-  await pipeline(
-    stdin,
-    new LineSplitter(),
-    new ParagraphParser(),
-    new Unwrapper(),
-    new RtfGenerator(),
-    stdout,
-  );
-}
-
-main().catch(console.error);
+await pipeline(
+  stdin,
+  new LineSplitter(),
+  new ParagraphParser(),
+  new Unwrapper(),
+  new RtfGenerator(),
+  stdout,
+);
diff --git a/vcbuild.bat b/vcbuild.bat
index f0fca0ad7136ae..a6a902a55896f7 100644
--- a/vcbuild.bat
+++ b/vcbuild.bat
@@ -399,7 +399,7 @@ if errorlevel 1 echo "Could not create junction to 'out\%config%'." & exit /B
 if not defined sign goto licensertf
 
 call tools\sign.bat Release\node.exe
-if errorlevel 1 echo Failed to sign exe&goto exit
+if errorlevel 1 echo Failed to sign exe, got error code %errorlevel%&goto exit
 
 :licensertf
 @rem Skip license.rtf generation if not requested.
@@ -425,7 +425,7 @@ if "%use_x64_node_exe%"=="true" (
   %node_exe% tools\license2rtf.mjs < LICENSE > %config%\license.rtf
 )
 
-if errorlevel 1 echo Failed to generate license.rtf&goto exit
+if errorlevel 1 echo Failed to generate license.rtf, got error code %errorlevel%&goto exit
 
 :stage_package
 if not defined stage_package goto install-doctools
@@ -525,7 +525,7 @@ if errorlevel 1 goto exit
 
 if not defined sign goto upload
 call tools\sign.bat node-v%FULLVERSION%-%target_arch%.msi
-if errorlevel 1 echo Failed to sign msi&goto exit
+if errorlevel 1 echo Failed to sign msi, got error code %errorlevel%&goto exit
 
 :upload
 @rem Skip upload if not requested