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Nix Hackers

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For people hacking on the Nix package manager itself189 Servers

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SenderMessageTime
8 Dec 2025
@dramforever:matrix.orgdramforeveroooh this is why it only fails if no sandbox12:43:24
@xokdvium:matrix.orgSergei Zimmerman (xokdvium)Yup...12:43:39
@dramforever:matrix.orgdramforeveroh12:46:04
@dramforever:matrix.orgdramforeverduh12:46:07
@dramforever:matrix.orgdramforever i was trying to --no-sandbox and i don't think that does anything... 12:46:20
@dramforever:matrix.orgdramforeverprobably for the better12:46:34
@dramforever:matrix.orgdramforeverthis is fixed but it's so un-cherry-pick-able13:02:48
@dramforever:matrix.orgdramforeverthere's like a whole new url parsing infrastructure thing added on13:03:08
@xokdvium:matrix.orgSergei Zimmerman (xokdvium) Yeah, I know. Probably just doing a percentDecode on the localPath would be enough 13:03:42
@dramforever:matrix.orgdramforeverupdate on that is i just realized i can repro this locally on linux if i just do sandbox = false16:43:58
@dramforever:matrix.orgdramforeverso i'm running a build with this patch https://github.com/NixOS/nix/pull/1473416:44:11
@dramforever:matrix.orgdramforeverhopefully that would fix it16:44:30
@joerg:thalheim.ioMic92

John Ericson: looks like there is some issue now when using the current stable nix against a new nix daemon?

clan-env % nix develop
path '/home/joerg/git/clan-core/pkgs/clan-cli' does not contain a 'flake.nix', searching up
error:
       … while checking derivation '/nix/store/v8qnm8aabm0fp0v2xf3cavsgwqfgc2bk-clan-env.drv'

       error: derivation has incorrect deferred output, should be '/nix/store/jq6nq5bvdv23xdjajsaj2ay6vni5bkki-clan-env'

clan-env % real-which nix
/nix/store/ah8kqqslr7jig18fd4hzmdk2bhbqs8a7-nix-2.31.2/bin/nix


clan-env % /nix/store/7ykgjirdiwxkdwyh3hypd27ifx7aws29-nix-2.33.0pre20251208_5b5d4cb/bin/nix develop
path '/home/joerg/git/clan-core/pkgs/clan-cli' does not contain a 'flake.nix', [joerg@eve clan-cli]$

16:50:58
@dramforever:matrix.orgdramforevernevermind17:01:56
@dramforever:matrix.orgdramforeverthe tests just fail on linux without sandbox...17:02:15
@dramforever:matrix.orgdramforeverwhat the heck17:02:20
@Ericson2314:matrix.orgJohn Ericson
In reply to @joerg:thalheim.io

John Ericson: looks like there is some issue now when using the current stable nix against a new nix daemon?

clan-env % nix develop
path '/home/joerg/git/clan-core/pkgs/clan-cli' does not contain a 'flake.nix', searching up
error:
       … while checking derivation '/nix/store/v8qnm8aabm0fp0v2xf3cavsgwqfgc2bk-clan-env.drv'

       error: derivation has incorrect deferred output, should be '/nix/store/jq6nq5bvdv23xdjajsaj2ay6vni5bkki-clan-env'

clan-env % real-which nix
/nix/store/ah8kqqslr7jig18fd4hzmdk2bhbqs8a7-nix-2.31.2/bin/nix


clan-env % /nix/store/7ykgjirdiwxkdwyh3hypd27ifx7aws29-nix-2.33.0pre20251208_5b5d4cb/bin/nix develop
path '/home/joerg/git/clan-core/pkgs/clan-cli' does not contain a 'flake.nix', [joerg@eve clan-cli]$

Woah!
17:02:25
@Ericson2314:matrix.orgJohn EricsonAre you doing CA derivations?17:02:31
@xokdvium:matrix.orgSergei Zimmerman (xokdvium)
In reply to @dramforever:matrix.org
the tests just fail on linux without sandbox...
Let me guess, `/homeless-shelter’ exists?
17:04:27
@dramforever:matrix.orgdramforeveri don't think so17:05:11
@dramforever:matrix.orgdramforeveri can try to mess with sandbox-build-dir though17:08:35
@dramforever:matrix.orgdramforevermaybe it's some cgroup and auto-allocate-uids stuff?17:18:34
@joerg:thalheim.ioMic92no.17:29:44
@joerg:thalheim.ioMic92no to what?17:37:20
@joerg:thalheim.ioMic92Probably should be merged before the release: https://github.com/NixOS/nix/pull/1473920:16:00
@joerg:thalheim.ioMic92https://github.com/NixOS/nix/pull/14743 and now this one as well22:27:09
9 Dec 2025
@niksnut:matrix.orgniksnutRelease notes PR, please add anything relevant that's missing: https://github.com/NixOS/nix/pull/1475215:57:43
@keiichi:matrix.orgteto I cant edit but for #8871 (teto) it's a PR that makes nix flake show keep going even when an attribute in "packages" is not a derivation. ie., it lists all attributes and names the ones that are not derivations (it previously didn't so you have to check which one was not a derivation) 16:31:35
@Ericson2314:matrix.orgJohn Ericson Sergei Zimmerman (xokdvium): what exactly did you find with 2.4 and nulls? 16:56:00
@Ericson2314:matrix.orgJohn Ericsonmy guess that it never parsed the nulls, but also back then it wasn't making a data structure16:56:20

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