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Nix Hackers

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For people hacking on the Nix package manager itself189 Servers

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13 Oct 2025
@k900:0upti.meK900 You want #Nixpkgs / NixOS contributions 17:16:14
@mrdev023:matrix.orgmrdev023thx17:16:40
@mrdev023:matrix.orgmrdev023 I can't join it K900 .... 17:17:15
@mrdev023:matrix.orgmrdev023My bad just a matrix bug17:17:44
@perpetrator1:matrix.org@perpetrator1:matrix.org left the room.19:22:59
@Ericson2314:matrix.orgJohn Ericson Robert Hensing (roberth): does nix eval override the "always trace" thing? 20:47:57
@roberthensing:matrix.orgroberth John Ericson: The problem there is that printValue only prints the "final" line, which is quite sensible, considering that it may print many "values" that throw 20:49:08
@Ericson2314:matrix.orgJohn Ericson Robert Hensing (roberth): this is implemented in the Printer class thing? 20:50:38
@roberthensing:matrix.orgroberthyeah20:50:50
@Ericson2314:matrix.orgJohn EricsonI would hope it could be more "semantic" and not just chop an error at one line?20:51:11
@roberthensing:matrix.orgroberthfor sure, it's the exception message without the traces20:51:57
@Ericson2314:matrix.orgJohn Ericson printError_ in this? 20:52:13
@Ericson2314:matrix.orgJohn Ericson Robert Hensing (roberth): OK throwing in the towel on tracing :) 21:01:00
@Ericson2314:matrix.orgJohn EricsonI left comments for the storing of the reason21:01:10
@Ericson2314:matrix.orgJohn Ericsonit should be very easy21:01:12
14 Oct 2025
@douglasfunster:matrix.org@douglasfunster:matrix.org joined the room.10:42:38
@sigmasquadron:matrix.orgSigmaSquadron joined the room.12:46:23
@joerg:thalheim.ioMic92https://www.phoronix.com/news/Fedora-Nix-Dir-Approved21:08:35
15 Oct 2025
@fzakaria:one.ems.hostfzakariaoh00:28:16
@fzakaria:one.ems.hostfzakariawow00:28:16
@fzakaria:one.ems.hostfzakaria

is there a way to make this more comprehnsible why it happens

[1/0/1 copied (176.7/176.7 MiB), 29.1 MiB DL] fetching source from https://cache.nixos.org

00:30:23
@fzakaria:one.ems.hostfzakariaI would be down to work on that..00:49:13
@joerg:thalheim.ioMic92What do you mean? 06:25:52
@joerg:thalheim.ioMic92
In reply to @justinrestivo:matrix.org
Hello! Any chance there's a spec about the different Fields provided for each ActivityType in the nix logger? Right now to answer this question I'm grepping the nix codebase for each ActivityType and looking at the arguments to the Activity::Activity constructor to infer the field types and number (if any exist). I'm wondering if there's an easier/more canonical way to do this.
I don't think so. There is maybe nix-output-monitor. I think also https://github.com/Thymis-io/thymis had a parser somewhere
06:32:47

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