When trying to enhance classes annotated with @Entity or @Embeddable at build-time, on Windows, hibernate-enhance-maven-plugin logs an error "Unable to delete class file [xxx.class]" for every class it processes.

See the attached test project (hbm-enhance-test.zip) to reproduce this issue.

Here is the relevant part of the Maven log:

[INFO] — hibernate-enhance-maven-plugin:4.3.8.Final:enhance (default) @ hbm-enhance-test —
[INFO] Started enhance plugin.....
[INFO] Processing Composite class file [hbm.test.Address].
[ERROR] Unable to delete class file [Address.class]
[INFO] Processing Entity class file [hbm.test.Director].
[ERROR] Unable to delete class file [Director.class]
[INFO] Processing Entity class file [hbm.test.Movie].
[ERROR] Unable to delete class file [Movie.class]
[INFO] Processing Entity class file [hbm.test.Theatre].
[ERROR] Unable to delete class file [Theatre.class]
[INFO] Enhance plugin completed.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Note that the build doesn't fail, but the compiled classes are not enhanced.
Running mvn compile -debug doesn't give more details about the error.