> installed through AUR (e.g. latest mpv releases that sometimes broke)

On my home system I'd do this to switch to a new mpv release:

"gitty mpv"

(This is my alias to check out the latest mpv sources, from github, via git clone URL_HERE.)

Scripts repackage mpv into .tar.xz after this git clone step.

Then I do:

"clangy mpv"

clangy is my alias to compile via clang from llvm; and the specific instructions would be found in my COOKBOOKS_DIRECTORY aka recipes (similar to homebrew, but in .yml files), where all information is gathered from mpv.yml then.

One setting there is:

   prefix: f

This means "non-traditional prefix", aka "AppDir" prefix. AppDir prefix is how GoboLinux installs software, e. g. in /Programs/Mpv/22.06.2026/ (I keep the dd.mm.yyyy notation, but this can be toggled; on my home system I use /home/Programs/ though rather than /Programs/ for historic reasons, and also as I want to backup my /home/ directory, including all programs).

So the above would, via clang, compile mpv from source (if the git clone worked), into the AppDir prefix. Then it would simply create symlinks and so some more processing, so /usr/bin/mpv would point at /home/Programs/Mpv/Current/bin/mpv, and Current is a Symlink to the current version in use. I can keep old entries of mpv under /home/Programs/Mpv/ so switching is trivial. And cleaning up is also trivial, I remove e. g. an old mpv version there, then call one post-removal script (or I simply pass the name of it, but I find it easier to work via the commandline in two steps here). The benefit of the above is that, for instance compared to your "latest mpv release sometimes broke", this would not affect me, the old mpv versions would work still, and there can not be any outside installation other than the versioned AppDir.

Right now my /home/Programs/ has 499 entries. I'll eventually have all programs there, and work, then I'll switch to a completely custom LFS/BLFS. Right now my base system is manjaro, which works very well as a base system, even though it uses systemd. /lib/ is a symlink on manjaro by default towards /usr/lib/ and so forth. I find this works so much better than e. g. debian.

> Got increasingly annoyed by Microslop and tried NixOS. Bumpy ride initially but after committing for few weeks I am finally settling on it be the last OS I need.

Not disagreeing at all, but imo the issue you had with AUR is one that by design could be completely avoided. I am not saying this is your fault, mind you; just pointing out that this may be an assumption by both AUR as well as you, since your expectation is to trust the package manager. Here, my input would be the question whether a package manager would be necessary in the first place or not (I still have scripts to handle that, mind you, but the assumptions made via AUR may be wrong in many areas, including not offering versioned AppDirs by default. I don't understand why all package managers do not offer versioned AppDirs; it would solve so many issues).

I should add that some programs are harder to install from source, but mpv works very well; ffmpeg too, surprisingly enough. LLVM/clang is a bit harder to setup, and by far the worst offender is firefox. Mozilla should be ashamed of mozconfig for life.

NixOS 26.05