diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index fe69e3e4..6660c795 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -4,6 +4,9 @@ trigger:
 - master
 - develop
 
+variables:
+  buildNumber: $(Date:yyMMdd)$(Rev:.r)
+
 jobs:
 - job: Linux
   pool:
@@ -76,7 +79,7 @@ jobs:
   - script: |
       set PATH=%PATH%;C:\Qt\Qt5.12.4\5.12.4\msvc2017_64\bin
       cd $(Build.SourcesDirectory)\ci\win
-      .\create_installer.cmd x64 7z $(Build.BuildNumber)
+      .\create_installer.cmd x64 7z $(buildNumber)
     displayName: 'Create installer'
   - task: CopyFiles@2
     inputs: