Hi, I start to thanks all your advices from previous emails related to ebuild development.
I send you this email to let off steam about the big mess to have latest OpenNebula version available in my Gentoo overlay. This was the problems I had to deal with: - patch many source files with sed to change /usr/lib into /usr/lib64 - pretend phase fails for use flag docker because requires -network-sandbox (I don't see value in the effort to use the docker-machine driver in opennebula, besides it was possible to get all required dependencies using EGO_SUM) - pretend phase fails for use flag sunstone in case of an hotfix release because it requires -network-sandbox (in this case is just impossible to manage npm and bower) - missing parser source files from official archive that I solved using archive from same github tag using ebuild files to add them - some files in /usr/lib64/one, /usr/share/one and /var/lib/one with executable permissions (I need to use cp -a to copy this directories to the image because the file permissions are set by their build tool, and there are so many that I haven't the time to review them in each release using the required Gentoo install functions) I send an email to upstream with all my complaints, asking them that all required dependencies for the source code must be present in the archive and not being downloaded during build. There are also compile problems for sunstone minified files using hotfix release, and that's the reason why I have those ebuilds hard masked. I also do a big improvement in ebuild code from the previous versions that I had removed since they are insecure. So in summary, is possible to install opennebula with network-sandbox but without docker-machine driver and only using stable releases without hotfixes. Anyway, the pretend phase tests for use flags docker and sunstone, and fails in case it requires -network-sandbox. So is an user decision in the end to allow -network-sandbox. Best,  https://cgit.gentoo.org/repo/user/ssnb.git/tree/app-emulation/opennebula
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