| 22 Jan 2026 |
|  pentane changed their profile picture. | 22:21:03 |
| 23 Jan 2026 |
|  @io:meat.computer left the room. | 00:52:51 |
 niko ⚡️ | Does Lix expose any probes for profiling, especially when it comes to eval? | 11:51:38 |
 piegames | What do you mean with probes? If you want to profile your Nix code then it has performance counters you can print with some flags (IIRC), when it comes to profiling eval itself then perf and callgrind it is | 12:44:10 |
 thubrecht | NIX_SHOW_STATS=1 is the env variable that makes it print the counters | 12:54:39 |
|  nea joined the room. | 13:05:52 |
 raitobezarius | we have USDT probes for HTTP transfers | 15:24:01 |
| raitobezarius | i want to introduce more probes, like, significantly more | 15:24:09 |
| raitobezarius | so that it's possible to write an eBPF profiler based on them for eval | 15:24:18 |
| raitobezarius | but didn't have time | 15:24:26 |
| niko ⚡️ | In reply to @piegames:flausch.social
What do you mean with probes? If you want to profile your Nix code then it has performance counters you can print with some flags (IIRC), when it comes to profiling eval itself then perf and callgrind it is I mean not profiling the eval implementation itself but profiling nix code against the current eval implementation. But those answer my question, thank you, I’ll see if the counters are sufficient for what I want to look into. Worst case I’ll just wait with anticipation for raito to get back to introducing more probes | 15:54:23 |
| raitobezarius | there's a function tracer as well fyi | 16:38:47 |
|  vczf changed their profile picture. | 18:47:02 |
| 24 Jan 2026 |
 Milo | lix fmt doesn't behave the same as nix fmt when invoked with no arguments.
nix fmt passes the project root directory (the one parent of the flake.nix) as the default argument.
Whereas, lix fmt simply acts as a nix run .#formatter.
Is this intentional? If so, what is the reason? If not, could I volunteer a PR to match nix's behaviour?
| 00:13:35 |
|  innocentzer0 joined the room. | 01:13:21 |
|  holly [she/it] 🏳️⚧️ changed their profile picture. | 09:08:06 |
 Acid Bong | In reply to @milo:wiro.world
lix fmt doesn't behave the same as nix fmt when invoked with no arguments.
nix fmt passes the project root directory (the one parent of the flake.nix) as the default argument.
Whereas, lix fmt simply acts as a nix run .#formatter.
Is this intentional? If so, what is the reason? If not, could I volunteer a PR to match nix's behaviour?
what's lix fmt? is there a lix-fmt executable? | 09:39:47 |
 neindochoh! / Seti (they/them) | Lix 2.92 introduced a breaking change in the behaviour of the fmt command: https://docs.lix.systems/manual/lix/2.94/release-notes/rl-2.92.html?highlight=fmt#breaking-changes | 09:46:19 |
| neindochoh! / Seti (they/them) | * | 09:48:05 |
| Acid Bong | In reply to @milo:wiro.world
lix fmt doesn't behave the same as nix fmt when invoked with no arguments.
nix fmt passes the project root directory (the one parent of the flake.nix) as the default argument.
Whereas, lix fmt simply acts as a nix run .#formatter.
Is this intentional? If so, what is the reason? If not, could I volunteer a PR to match nix's behaviour?
btw, what are Lix and Nix versions you're having? | 09:54:35 |
| niko ⚡️ | In reply to @milo:wiro.world
lix fmt doesn't behave the same as nix fmt when invoked with no arguments.
nix fmt passes the project root directory (the one parent of the flake.nix) as the default argument.
Whereas, lix fmt simply acts as a nix run .#formatter.
Is this intentional? If so, what is the reason? If not, could I volunteer a PR to match nix's behaviour?
I believe nix changed that behavior like a year ago at this point | 11:19:50 |
| niko ⚡️ | There’s been numerous warnings about that behavior changing soon at least | 11:20:06 |
| niko ⚡️ | This is also why it’s advised to use nixfmt-tree for the formatter output | 11:20:26 |
| 13 May 2024 |
|  zrsk joined the room. | 13:37:30 |
|  dariof4 joined the room. | 14:16:05 |
|  abbe joined the room. | 14:42:22 |
 mjm | lix is now in nixos-unstable, what's the best way to use it in a NixOS config? | 15:47:41 |
 K900 | nix.package = pkgs.lix | 15:47:54 |
| K900 | Probably | 15:47:58 |
| K900 | Or just keep using the module | 15:48:02 |
