[ebuild  N     ] media-libs/libv4l-1.32.0-r1::gentoo USE="jpeg utils -bpf -doc -dvb -qt6 -tracer" 1.3 MiB
[ebuild  N     ] dev-util/vulkan-headers-1.4.363.0::gentoo USE="-test" 3.3 MiB
[ebuild  N     ] media-libs/vulkan-loader-1.4.363.0::gentoo USE="X -wayland" 1.8 MiB
[ebuild  N     ] sys-power/wluma-4.3.0-r3::gentoo USE="-debug" 21.5 MiB

Total: 4 packages (4 new), Size of downloads: 27.8 MiB


 * Running sanity checks...
>>> media-libs/libv4l-1.32.0-r1: failed pkg_pretend
 /Volumes/Disk 1/gentoo-prefix/usr/lib/pkgcore/lib/pkgcore/ebd/.generated/libs/8/pkg_pretend: line 144: [[: invalid regular expression `': empty (sub)expression
  * ERROR: media-libs/libv4l-1.32.0-r1:: failed (pretend phase):
  *   USE flag 'bpf' not in IUSE for media-libs/libv4l-1.32.0-r1
  * 
  * Call stack:
  *    isolated-functions.bash, line  333:  called pkg_pretend
  *                ebuild.bash, line 3581:  called check_llvm
  *                ebuild.bash, line 1831:  called use 'bpf'
  *                pkg_pretend, line  145:  called die
  * 
  * Working directory: '/var/tmp/portage'

!!! Sanity checks failed, exiting...