diff --git a/build/Build.Pack.cs b/build/Build.Pack.cs
index e10de80e0..18ecfd1a3 100644
--- a/build/Build.Pack.cs
+++ b/build/Build.Pack.cs
@@ -123,7 +123,7 @@ public partial class Build
             // patch npm version
             var npmPackagesFile = SourceDirectory / "NSwag.Npm" / "package.json";
             content = TextTasks.ReadAllText(npmPackagesFile);
-            content = Regex.Replace(content, @"""version"": "".*""", @"""version"": """ + VersionPrefix + @"""");
+            content = Regex.Replace(content, @"""version"": "".*""", @"""version"": """ + nugetVersion + @"""");
             TextTasks.WriteAllText(npmPackagesFile, content);
 
             // ZIP directories