make -C build/x86_64 run/sculpt KERNEL=nova BOARD=pc

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Error: recipe for 'pkg/bsd_audio_drv' not found - unable to guess version
make: *** [Makefile:431: run/sculpt] Error 1
make: Leaving directory '/home/wsenn/genode/build/x86_64'
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bsd_audio_drv is in the dde_bsd repo, did you try enabling that in your build.conf?