| 18 Apr 2025 |
|  Winter joined the room. | 08:57:54 |
| Winter | anyone know if the docs to build locally w/ Meson are still accurate? the prefix env stuff doesn’t seem to work properly — --prefix gets properly passed to meson setup but ninja’s install phase is still trying to install into $PREFIX | 08:58:53 |
 allrealmsoflife | In reply to @winter:catgirl.cloud
anyone know if the docs to build locally w/ Meson are still accurate? the prefix env stuff doesn’t seem to work properly — --prefix gets properly passed to meson setup but ninja’s install phase is still trying to install into $PREFIX Are you trying to build Nix from source? Which docs are you following, the official ones building from source dont say much, and last time I failed building Nix from source too. | 09:10:44 |
 @trofi:matrix.org | New json-3.12.0 exposed a bug in how nix deserializes integers: https://github.com/NixOS/nix/issues/13046 | 15:54:09 |
 John Ericson | thanks trofi | 16:59:23 |
| John Ericson | I didn't know we had a $PREFIX defined? | 16:59:54 |
| Winter | In reply to @Ericson2314:matrix.org
I didn't know we had a $PREFIX defined? in the default nix-shell $PREFIX points to nix-util’s $out ;) | 17:00:16 |
| John Ericson | Winter: oh hmm that might be an artifact of how we made the dev shell? | 17:01:27 |
| Winter | yeah. but i guess that begs the question: has nobody tested the dev shell/does nobody use it? | 17:02:23 |
| Winter | like should a shell hook be added to just unset $prefix/$out? that seems simplest but shrug | 17:02:53 |
| Winter | or dontSetPrefix=true ig | 17:03:09 |
| John Ericson | Winter: I don't think we do much installing from the dev shell | 19:21:05 |
| Winter | fair, guess you just use the bins | 19:21:24 |
| John Ericson | what made you want to do that? | 19:21:24 |
| John Ericson | (though I do recall runnning installPhase and it worked with nix develop) | 19:21:40 |
| John Ericson | trofi: gotta say the nlohmann people don't seem super clear about this | 19:22:19 |
| Winter | nothing in particular | 19:22:33 |
| Winter | was just linearly following the docs | 19:22:33 |
| John Ericson | e.g. is a positive integer always parsed as an unsigned number? | 19:22:39 |
| John Ericson | do you need to try both just to be sure? | 19:22:44 |
| John Ericson | maybe the docs need to be changed? | 19:23:07 |
| John Ericson | before you had to install for the install tests | 19:23:12 |
| John Ericson | with since Meson you don't need t | 19:23:18 |
| John Ericson | * with since Meson you don't need to | 19:23:19 |
| Winter | In reply to @Ericson2314:matrix.org
maybe the docs need to be changed? might be best to remove the install section, yeah | 19:32:59 |
| @trofi:matrix.org | Yeah. AFAIU the https://github.com/nlohmann/json/issues/4475 as get_ref() can expose mutable references it's unsafe to return signed reference to unsigned underlying type (breaks -fstrict-aliasing assumptions). It was allowed by accident. And AFAIU whether to use signed or unsigned internally is dependent on actual json data. 0 is unsigned while -1 is signed. | 19:46:48 |
| 19 Apr 2025 |
|  @ochoa:matrix.org left the room. | 21:30:18 |
 jaen | I'm not sure if it's the best place to ask this, but I figured subflakes are new enough and not yet ironed out that it might as well be. I tried to play around with them with the latest nix to see how the situation has improved and I have two questions:
a) should I expect subflakes to work without a git repo, or not? If lockfiles are already there it seems to keep working even if I drop the .git folder, but without it will fail to generate the lock file complaining about access to absolute path '/nix/store/flake.nix' is forbidden in pure evaluation mode for a subflake that refers to its parent,
b) in another test I have a root flake, and two child flakes which are siblings. Both siblings refer to the parent, and one of the siblings refer to another, which results in a found circular import of flake for the root flake. Is this something that is not supposed work "by specification" or is it a consequence of https://github.com/NixOS/nix/issues/7730 not being resolved yet? I feel intuitively that this should work, but maybe there's something I missing that makes it impossible? | 22:07:11 |
|  alexfmpe changed their profile picture. | 23:56:01 |
| 20 Apr 2025 |
|  orhosko joined the room. | 08:51:54 |
