Erase build directory if exists before building for Windows installer generation.

.gitlab-ci.yml

@@ -88,7 +88,7 @@ package_win:
     stage: package_rev
     script:
         - 'set SHA_START=%CI_COMMIT_SHA:~0,8%'
-        - if NOT EXIST build (mkdir build)
+        - if NOT EXIST build (mkdir build) else rmdir /S /Q build
         - cd build
         - 'cmake -G "MinGW Makefiles" -DBUILD_WRAPPER_MATLAB=ON -DBUILD_WRAPPER_PYTHON=ON -DSLOW_TESTS=OFF -DCPACK_PACKAGE_VERSION=%SHA_START% -DBUILD_DOCUMENTATION=ON -DEXCLUDE_FAUST_LIB_INSTALL=ON -DCMAKE_INSTALL_PREFIX=win_pkg_build ..'
         - make
@@ -156,7 +156,7 @@ package_macos_release:
 
 package_win_release:
     script:
-        - if NOT EXIST build (mkdir build)
+        - if NOT EXIST build (mkdir build) else rmdir /S /Q build
         - cd build
         - 'cmake -G "MinGW Makefiles" -DBUILD_WRAPPER_MATLAB=ON -DBUILD_WRAPPER_PYTHON=ON -DSLOW_TESTS=OFF -DCPACK_PACKAGE_VERSION=%CI_COMMIT_TAG% -DBUILD_DOCUMENTATION=ON -DEXCLUDE_FAUST_LIB_INSTALL=ON -DCMAKE_INSTALL_PREFIX=win_pkg_build ..'
         - make