diff --git a/.gitea/workflows/build_and_test.yml b/.gitea/workflows/build_and_test.yml
index 8e33668d..b08e9e07 100644
--- a/.gitea/workflows/build_and_test.yml
+++ b/.gitea/workflows/build_and_test.yml
@@ -79,10 +79,14 @@ jobs:
       - name: Build viewer
         shell: cmd
         run: |
+          for /f "usebackq tokens=*" %%i in (`"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -latest -property installationPath`) do set "VSPATH=%%i"
+          call "%VSPATH%\VC\Auxiliary\Build\vcvars64.bat"
           cmake --build build --target jfjoch_viewer
       - name: Build installer (NSIS)
         shell: cmd
         run: |
+          for /f "usebackq tokens=*" %%i in (`"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -latest -property installationPath`) do set "VSPATH=%%i"
+          call "%VSPATH%\VC\Auxiliary\Build\vcvars64.bat"            
           cd build
           cpack
   build-rpm: