Same famous problem for any kind of make-based build system, removing targets usually leave old files in your build directory. IIRC Bazel can avoid it but don’t

Same famous problem for any kind of make-based build system, removing targets usually leave old files in your build directory. IIRC Bazel can avoid it but don’t know how, either it must keep a list of old files or compare the entirety of build directory to the build-graph.