diff --git a/build-tools/automation/azure-pipelines.yaml b/build-tools/automation/azure-pipelines.yaml
index c163b2203..6888adaf8 100644
--- a/build-tools/automation/azure-pipelines.yaml
+++ b/build-tools/automation/azure-pipelines.yaml
@@ -109,7 +109,7 @@ jobs:
 
   - script: >
       dotnet tool install --global boots &&
-      boots --preview Mono
+      boots https://download.mono-project.com/archive/6.12.0/macos-10-universal/MonoFramework-MDK-6.12.0.145.macos10.xamarin.universal.pkg
     displayName: Install Mono
 
   - script: make prepare CONFIGURATION=$(Build.Configuration) JI_MAX_JDK=$(MaxJdkVersion)