portage-ng / portage / dev-lang / pypy3-exe / 3.12.8.0.0
pmerge --pretend --verbose
[ebuild  N     ] dev-python/pypy-exe-bin-8.0.1:8.0.1::gentoo 10.7 MiB
[ebuild  N     ] dev-lang/pypy-2.7.8.0.1:2.7/pypy-80::gentoo USE="bzip2 gdbm jit ncurses sqlite -full-stdlib -tk" 20.7 MiB
[ebuild  N     ] dev-lang/pypy3-exe-3.12.8.0.0:3.12.8.0.0::gentoo USE="jit ncurses -low-memory" CPU_FLAGS_X86="sse2" 24.6 MiB

Total: 3 packages (3 new), Size of downloads: 56.0 MiB


 * Running sanity checks...
>>> dev-lang/pypy3-exe-3.12.8.0.0: 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: dev-lang/pypy3-exe-3.12.8.0.0:: failed (pretend phase):
  *   USE flag 'low-memory' not in IUSE for dev-lang/pypy3-exe-3.12.8.0.0
  * 
  * Call stack:
  *    isolated-functions.bash, line  333:  called pkg_pretend
  *                ebuild.bash, line 1108:  called check_env
  *                ebuild.bash, line  930:  called use 'low-memory'
  *                pkg_pretend, line  145:  called die
  * 
  * Working directory: '/var/tmp/portage'

!!! Sanity checks failed, exiting...

Wall time
0.724 s vs. 0.034 s for portage-ng