nix-processmgmt VS nixGL

I somewhere saw this project being mentioned: https://github.com/svanderburg/nix-processmgmt

That's nice and it showcases how Nix can create a declarative process management atop a script-based imperative manager. How is your experience with it? Also note that there's https://github.com/svanderburg/nix-processmgmt, a manager agnostic processes management framework supporting s6 among others, but your way seems a bit more straightforward.

There's a project still being developed: https://github.com/svanderburg/nix-processmgmt my understanding is that if home-manager would use it (I don't know if there is even plan to do that, it's not the same author), it would be able to work without needing systemd.

(builtins.fetchTarball "https://github.com/svanderburg/nix-processmgmt/archive/6def8584c6b028c922c550859a07b989d21d6f73.tar.gz")

It's not really clear to me what you are asking. Are you maybe looking for nix-processmgmt? (NixCon 2020 talk: https://cfp.nixcon.org/nixcon2020/talk/TW79FU/)

How can a program accomplish this? by using/doing something like virtualization? emulation? syscall/API translation? e.g. like WINE?

  [1] https://github.com/nix-community/nixGL

Essentially, running stuff that needs GL graphics is a bit funky... There's a workaround called nixGL though.

I think installing Calibre is a good use case for installing Nix (www.nixos.org).

Unfortunately, you might also need https://github.com/guibou/nixGL to run graphical apps under Nix. It's a shell script to use the correct OpenGL library.

Try the NixGL wrapper.

Are you running the Nix package manager on not-NixOS? If so I recall needing NixGL for OpenGL integration.

$ nix-channel --list home-manager https://github.com/nix-community/home-manager/archive/release-22.05.tar.gz nixgl https://github.com/guibou/nixGL/archive/main.tar.gz nixos https://nixos.org/channels/nixos-unstable

Needs a separate program to run GUI applications on non-NixOS systems

IMO the proper solution to this is Nix/Guix, since they have the best of both worlds (sharing libraries where possible, but allowing different versions where needed). Shame that libGL is a mess and as such is difficult to get right in this way, and as such you need hacks like https://github.com/guibou/nixGL for most GUI stuff. That said, people are working on improving the situation.

I get what you mean, but keep in mind that for every distro you're reliant on the community to get nvidia support integrated. Also if you only have few apps that require it, then the nixGL flake is not bad. https://github.com/guibou/nixGL

nix-channel --add https://github.com/guibou/nixGL/archive/main.tar.gz nixgl && nix-channel --update warning: unable to download 'https://cache.nixos.org/v5djb4jw3hg4brdbidqaspin8n8isyq6.narinfo': SSL peer certificate or SSH remote key was not OK (60); retrying in 259 ms these derivations will be built: /nix/store/gm6gq44ivdqgmrsvlsr08d2nqjircgds-nixgl.drv building '/nix/store/gm6gq44ivdqgmrsvlsr08d2nqjircgds-nixgl.drv'... while setting up the build environment: executing '/bin/bash': No such file or directory builder for '/nix/store/gm6gq44ivdqgmrsvlsr08d2nqjircgds-nixgl.drv' failed with exit code 1 error: build of '/nix/store/gm6gq44ivdqgmrsvlsr08d2nqjircgds-nixgl.drv' failed error: program '/usr/bin/nix-build' failed with exit code 100