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	Lix user channel. Feel free to discuss on-topic issues here and give each other help. For matrix.to links to the rest of the Lix channels, see: https://wiki.lix.systems/books/lix-organisation/page/matrix-rooms	316 Servers

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Sender	Message	Time
7 Apr 2026
raitobezarius	I'm not sure myself but I'd take a look at path registration for .drvs	22:27:28
raitobezarius	I'm going to bed for now, but I can take a look a bit more later	22:27:35
Jules Lamur	You gave me some clues on where to search already. I hope I will figure this out tonight :) Thanks a lot! Have a good night :)	22:32:31
quartz	what is Pasta in Lix?	22:36:07
quartz	* what is Pasta in Lix as referred to by the announcement?	22:36:25
Jules Lamur	https://passt.top	22:38:00
zoë (she/her)	(basically, if i understand correctly: on linux, it allows giving as much flexibility as possible to derivations that use the network (normally only fixed-output derivations), by putting them in "user namespaces" (a similar mechanism to how isolation works for containers). without pasta, you'd need to run a larger chunk of the network- and isolation-managing code as root, extending the attack surface (and generally making things messier and harder to maintain))	22:45:47
zoë (she/her)	i'm not a team member though so take what i say with a grain of salt	22:46:30
Jules Lamur	I think I figured it out raito, `nix-store` does not add what it does not have in its local store, after a GC of my a, b and c drvs and outputs: `$ nix-store -q -R --include-outputs "$(nix-instantiate --raw -A c --arg entropy '"asdf"')" warning: you did not specify '--add-root'; the result might be removed by the garbage collector /nix/store/bdv4b4s9wryp2cd951x276z17s7v1pi3-basic_builder /nix/store/xdz4vb0mxqi9qdw277xbvcbgkq3hdlwc-a.drv /nix/store/2xs04agqx8ky9rnrxpis7d8ykhd86l9v-b.drv /nix/store/xnamzrlkfhg36l5hzpqbsj9ipra0114y-c.drv` I expected to be able to re-use `nix-store -q` to query the list of all dependencies (at build and runtime) without having to populate my local store. I guess I will fall back to recursively parsing the `.drv`s by myself :)	22:49:50
Jules Lamur	* https://passt.top (edit: sorry I didn't mean to RTFM, I thought you just asked for a link)	22:50:34
Jules Lamur	* I think I figured it out raito, `nix-store` does not add what it does not have in its local store, after a GC of my a, b and c drvs and outputs: `$ nix-store -q -R --include-outputs "$(nix-instantiate --raw -A c)" warning: you did not specify '--add-root'; the result might be removed by the garbage collector /nix/store/bdv4b4s9wryp2cd951x276z17s7v1pi3-basic_builder /nix/store/xdz4vb0mxqi9qdw277xbvcbgkq3hdlwc-a.drv /nix/store/2xs04agqx8ky9rnrxpis7d8ykhd86l9v-b.drv /nix/store/xnamzrlkfhg36l5hzpqbsj9ipra0114y-c.drv` I expected to be able to re-use `nix-store -q` to query the list of all dependencies (at build and runtime) without having to populate my local store. I guess I will fall back to recursively parsing the `.drv`s by myself :)	22:52:19
quartz	In reply to @jlamur:matrix.org https://passt.top (edit: sorry I didn't mean to RTFM, I thought you just asked for a link) no I was fine with this, thanks	22:53:53
quartz	In reply to @blokyk:matrix.org (basically, if i understand correctly: on linux, it allows giving as much flexibility as possible to derivations that use the network (normally only fixed-output derivations), by putting them in "user namespaces" (a similar mechanism to how isolation works for containers). without pasta, you'd need to run a larger chunk of the network- and isolation-managing code as root, extending the attack surface (and generally making things messier and harder to maintain)) and thank you too	22:53:58
zoë (she/her)	i don't know what you're trying to find the end, and i can't try it right now, but if you're trying to do recursive stuff on drv dependencies, could `nix path-info --recursive` help you?	22:55:05
raitobezarius	In reply to @weirdrock:4d2.org what is Pasta in Lix as referred to by the announcement? https://docs.lix.systems/manual/lix/stable/advanced-topics/pasta.html	22:55:10
zoë (she/her)	aaah i was too lazy to check the manual and couldn't find it with google so i just assumed i hallucinated it because of tiredness	22:56:06
raitobezarius	In reply to @jlamur:matrix.org I think I figured it out raito, `nix-store` does not add what it does not have in its local store, after a GC of my a, b and c drvs and outputs: `$ nix-store -q -R --include-outputs "$(nix-instantiate --raw -A c)" warning: you did not specify '--add-root'; the result might be removed by the garbage collector /nix/store/bdv4b4s9wryp2cd951x276z17s7v1pi3-basic_builder /nix/store/xdz4vb0mxqi9qdw277xbvcbgkq3hdlwc-a.drv /nix/store/2xs04agqx8ky9rnrxpis7d8ykhd86l9v-b.drv /nix/store/xnamzrlkfhg36l5hzpqbsj9ipra0114y-c.drv` I expected to be able to re-use `nix-store -q` to query the list of all dependencies (at build and runtime) without having to populate my local store. I guess I will fall back to recursively parsing the `.drv`s by myself :) Worth a feature request perhaps	22:56:06
Jules Lamur	thanks for the suggestion, it has the same behavior sadly :(	23:03:50
Jules Lamur	what I'm trying to do is get the complete list of all the .drv and outputs of all the dependencies in `pkgs/top-level/release.nix` (or `nixos/release.nix`, it does not matter)	23:05:15
Jules Lamur	(without having to fill my local store with >1TB of packages)	23:06:09
raitobezarius	nix-eval-jobs ?	23:06:35
Jules Lamur	yes, that's what I do, but it returns the leaves' .drv (unless I'm missing something?)	23:07:09
raitobezarius	hmmm force recurse should return all drvs up to the bootstrap tarballs i think	23:08:16
Jules Lamur	I'm not sure about that, force-recurse forces recursion in attrs declared in release.nix, not in the dependency tree of each packages AFAIU	23:09:13
Jules Lamur	(I already use `--force-recurse` otherwise eval-jobs stops its evaluation without evaluating anything since there is at least one level of nested attrs in `release.nix`)	23:11:01
Jules Lamur	`$ nix-eval-jobs --expr '(import ((builtins.fetchTarball { url = "https://releases.nixos.org/nixos/25.11-small/nixos-25.11.8880.5a035534a428/nixexprs.tar.xz"; }) + "/nixos/release-small.nix") {}).nixpkgs' --force-recurse \| wc -l 46`	23:12:40
whispers [& it/fae]	--no-instantiate	23:14:13
whispers [& it/fae]	* --no-instantiate?	23:14:15
whispers [& it/fae]	* --no-instantiate? dunno if that does what you need but it does avoid writing out derivations	23:15:30
Jules Lamur	(I already tried that IIRC it prevents nix from putting the drvs in the store, but I tried to re-run it in case I missed something -- it's in progress)	23:16:08

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