diff --git a/build_projects/shared-build-targets-utils/Utils/DebPackageCreator.cs b/build_projects/shared-build-targets-utils/Utils/DebPackageCreator.cs
index 60b1bf582..6d2a9dc6e 100644
--- a/build_projects/shared-build-targets-utils/Utils/DebPackageCreator.cs
+++ b/build_projects/shared-build-targets-utils/Utils/DebPackageCreator.cs
@@ -147,7 +147,7 @@ namespace Microsoft.DotNet.Cli.Build
             foreach (var variable in debianConfigVariables)
             {
                 var variableToken = $"%{variable.Key}%";
-                debianConfigFileContents.Replace(variableToken, variable.Value);
+                debianConfigFileContents = debianConfigFileContents.Replace(variableToken, variable.Value);
             }
 
             File.WriteAllText(debianConfigFile, debianConfigFileContents);