jack2 is properly found but I can not build successfully due to bug 735916.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=0396facd8f27eee98893cfc68de03905d9b95892 commit 0396facd8f27eee98893cfc68de03905d9b95892 Author: Miroslav Šulc <fordfrog@gentoo.org> AuthorDate: 2020-08-08 08:48:35 +0000 Commit: Miroslav Šulc <fordfrog@gentoo.org> CommitDate: 2020-08-08 08:48:51 +0000 media-sound/milkytracker: fixes 1) added xdg 2) switched to virtual/jack 3) fixed compilation wrt rtmidi Closes: https://bugs.gentoo.org/736306 Closes: https://bugs.gentoo.org/735916 Package-Manager: Portage-3.0.1, Repoman-2.3.23 Signed-off-by: Miroslav Šulc <fordfrog@gentoo.org> ...ker-1.02.00-fix-hard-dependency-on-rtmidi.patch | 85 ++++++++++++++++++++++ ...02.00.ebuild => milkytracker-1.02.00-r1.ebuild} | 9 ++- 2 files changed, 92 insertions(+), 2 deletions(-)