| 4 Mar 2025 |
 Nick Cao | I always wanted a thing that: what if we store store paths as compressed nars on the disk, and only use fuse to create an illusion of a nix store | 14:24:08 |
 emily | that's what Tvix is doing, afaik | 14:24:23 |
| emily | though I think FUSE performance kind of sucks, so you probably need to put something in the kernel at some point | 14:24:39 |
 Arian | I have usecases where I dont actually have a stage-2 and just bring the app up in initrd. In that case it’s definitely useful I think | 14:24:45 |
| emily | don't quote me on that though | 14:24:47 |
| emily | conversely maybe we'd want an escape hatch for people wild enough to actually want to run a daemon in stage 1? but those people also probably know what they're doing enough to make it work for themselves anyway. | 14:25:34 |
| emily | anyway it seems like a good idea. would be nice to avoid patching systemd for it though. | 14:25:54 |
| Arian | just s|/usr|/nix/store| through the entire codebase | 14:26:14 |
| Arian | :D | 14:26:20 |
| emily | we could just move the store into /usr. | 14:26:32 |
| emily | I bet that would make Poettering happy. | 14:26:41 |
| Arian | yeh but we’ll have to move /nix/var to /var then | 14:26:44 |
| Arian | Honestly how much breaks when we’d set NIX_STORE=/usr/store ? | 14:27:01 |
| Nick Cao | /usr/store | 14:27:04 |
| Arian | did anyone ever try?? | 14:27:06 |
| Nick Cao | So the length is the same | 14:27:07 |
| emily | make it /usr/local/nix and I'll spend Darwin capital on the paint for the bikeshed | 14:27:27 |
| Arian | sure. gotta rebuild the world. but that’s… fine | 14:27:30 |
| Nick Cao | sed the world actually | 14:27:43 |
| emily | alternate store directories are nominally supported. the Nix on Droid thing uses them | 14:27:44 |
| emily | there are packages that hard-code it but not that many. probably NixOS makes more assumptions | 14:28:10 |
| emily | no fundamental obstacle, to my knowledge | 14:28:10 |
| Arian | can you build for a /usr/store on a /nix/store system? | 14:28:11 |
| Arian | like. how do you bootstrap this | 14:28:18 |
| emily | I think you need a separate daemon | 14:28:20 |
 Willi Butz | /usr/nix/store definitely works as is, with a ro-bind to /nix/store (done with the verity repart module) | 14:28:26 |
 Lily Foster | In reply to @emilazy:matrix.org
alternate store directories are nominally supported. the Nix on Droid thing uses them (nix on droid also does sketchy bwrapping to pretend it's at /nix/store iirc) | 14:28:27 |
| emily | can't use bwrap on Android. I think PRoot is involved | 14:28:51 |
| Arian | that’s in. stage-2. I’m talking about the nix store in the initramfs willi | 14:29:00 |
| Lily Foster | In reply to @emilazy:matrix.org
can't use bwrap on Android. I think PRoot is involved yeah that, proot | 14:29:04 |
