diff --git a/src/Microsoft.AspNetCore.Server.IISIntegration.Tools/PublishIISCommand.cs b/src/Microsoft.AspNetCore.Server.IISIntegration.Tools/PublishIISCommand.cs
index eea405c817..6ead3cf364 100644
--- a/src/Microsoft.AspNetCore.Server.IISIntegration.Tools/PublishIISCommand.cs
+++ b/src/Microsoft.AspNetCore.Server.IISIntegration.Tools/PublishIISCommand.cs
@@ -91,7 +91,8 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.Tools
             }
 
             var builder = new ConfigurationBuilder()
-                .AddJsonFile(Path.Combine(applicationBasePath, "hosting.json"), optional: true);
+                .SetBasePath(applicationBasePath)
+                .AddJsonFile("hosting.json", optional: true);
 
             var webroot = builder.Build()["webroot"];
 
diff --git a/src/dotnet-publish-iis/PublishIISCommand.cs b/src/dotnet-publish-iis/PublishIISCommand.cs
index c2d7aa83f1..6bb3f66d76 100644
--- a/src/dotnet-publish-iis/PublishIISCommand.cs
+++ b/src/dotnet-publish-iis/PublishIISCommand.cs
@@ -91,7 +91,8 @@ namespace Microsoft.AspNetCore.Tools.PublishIIS
             }
 
             var builder = new ConfigurationBuilder()
-                .AddJsonFile(Path.Combine(applicationBasePath, "hosting.json"), optional: true);
+                .SetBasePath(applicationBasePath)
+                .AddJsonFile("hosting.json", optional: true);
 
             var webroot = builder.Build()["webroot"];