Anyone know how to re-precompile a package in julia 1.6.0 rc?

Anyone know how to re-precompile a package in julia 1.6.0 rc?

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I am specifically trying to re-precompile CUDA with changed environment variables. pkg> precompile seems to do nothing in my case: I believe it only precompiles packages that obviously need recompiling (after adding or update). The only thing that seems to work is removing the ~/.julia/compiled/v1.6/CUDA directory.