pmerge --pretend --verbose
[ebuild N ] sci-libs/fftw-3.3.10-r1:3.0/3::gentoo USE="openmp threads -doc -fortran -mpi -test (-zbus)" CPU_FLAGS_X86="avx avx2 fma3 sse sse2 -fma4" 4.0 MiB
[ebuild N ] sci-astronomy/skymaker-3.10.5::gentoo USE="threads" 497.0 KiB
Total: 2 packages (2 new), Size of downloads: 4.4 MiB
* Running sanity checks...
>>> sci-libs/fftw-3.3.10-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: sci-libs/fftw-3.3.10-r1:: failed (pretend phase):
* USE flag 'openmp' not in IUSE for sci-libs/fftw-3.3.10-r1
*
* Call stack:
* isolated-functions.bash, line 333: called pkg_pretend
* ebuild.bash, line 2167: called use 'openmp'
* pkg_pretend, line 145: called die
*
* Working directory: '/var/tmp/portage'
!!! Sanity checks failed, exiting...
- Wall time
- 0.734 s vs. 0.020 s for portage-ng