Clean build directories before CMake

Jenkinsfile

@@ -6,6 +6,7 @@ pipeline {
             agent { label 'linux' }
             steps {
                 sh '''
+                    rm -rf build/linux
                     cmake -S . -B build/linux -G Ninja -DCMAKE_BUILD_TYPE=Release
                     cmake --build build/linux
                 '''
@@ -18,11 +19,14 @@ stage('Check Windows Agent') {
                 bat '''
                     echo Windows agent works
                     hostname
-            where cl
                     where cmake
                     where ninja
                     where git
                     java -version
+
+                    call "C:\\Program Files\\Microsoft Visual Studio\\2022\\BuildTools\\VC\\Auxiliary\\Build\\vcvars64.bat"
+                    where cl
+                    cl
                 '''
             }
         }