pmerge --pretend --verbose
[ebuild UD ] net-libs/libmicrohttpd-1.0.1:0/12::gentoo [1.0.1-r1:0/12::gentoo] USE="epoll eventfd ssl thread-names -debug -static-libs -test (-verify-sig%)" 2.1 MiB
Total: 1 package (1 downgrade), Size of downloads: 2.1 MiB
* Running sanity checks...
>>> net-libs/libmicrohttpd-1.0.1: 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: net-libs/libmicrohttpd-1.0.1:: failed (pretend phase):
* USE flag 'kernel_linux' not in IUSE for net-libs/libmicrohttpd-1.0.1
*
* Call stack:
* isolated-functions.bash, line 333: called pkg_pretend
* ebuild.bash, line 2096: called use 'kernel_linux'
* pkg_pretend, line 145: called die
*
* Working directory: '/var/tmp/portage'
!!! Sanity checks failed, exiting...
- Wall time
- 0.720 s vs. 0.011 s for portage-ng