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Nixpkgs Stdenv

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24 Nov 2025
@amadaluzia:unredacted.orgamadaluzia changed their display name from amadaluzia (🇹🇷 til 25th) to amadaluzia.12:57:08
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25 Nov 2025
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28 Nov 2025
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29 Nov 2025
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30 Nov 2025
@aleksi:pikaviestin.fialeksiHi! Would there be interest in an x86_64-native and riscv64-native minimal bootstrap chain? I've been working on fixing some bugs in tinycc-mob to hopefully make this possible11:31:25
@helle:tacobelllabs.nethelle (just a stray cat girl)I have been slightly working on riscv64 bootstrap, though with a slightly different early approach, though the latter stages in the bootstrap are identical and would be useful to have polished11:36:00
@helle:tacobelllabs.nethelle (just a stray cat girl)sadly due to illness not managed to work on it much11:36:25
@aleksi:pikaviestin.fialeksiSorry to hear that. An alternative early stage sound interestings11:37:58
@aleksi:pikaviestin.fialeksi * 11:38:03
@helle:tacobelllabs.nethelle (just a stray cat girl)yep, as the quality of tinycc uh, leaves some to be desired11:41:16
@qyliss:fairydust.spaceAlyssa RossI think there certainly would be12:11:51
@pyrox:pyrox.devdish [Fox/It/She]i would definitely be interested in that15:19:24
@pyrox:pyrox.devdish [Fox/It/She]also looking for any additional reviews/feedback on https://github.com/NixOS/nixpkgs/pull/448701 before I merge it15:26:04
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4 Aug 2022
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6 Aug 2022
@winterqt:nixos.devWinter (she/her)

Does anyone know where the fact that the Darwin stdenv builds CMake twice comes from? As far as I can tell, it's from stage 0, and then just gets used in the other stages from there. Am I missing something here, is it something with the overrides? It looks like it might be, but then the fact that those are only allowed in the final stage (per booter.nix) (when that doesn't seem true, since then they wouldn't be defined...?) comes up.

(Isn't this the same pattern (defining in one stage and referencing in the others) that makes Glibc only build a limited number of times in the Linux stdenv?)

08:00:17
@trofi:matrix.orgtrofi

You think cmake should be rebuild less? Or more?

glibc's is probably a bit different as it's a part of stdenv.cc.libc and mainly used by that I would guess. Also, if depends if the package is used or not by other packages in the derivation would affect rebuild count as well.

14:59:09
@trofi:matrix.orgtrofi Looking at stdenv's dep tree I see 2 cmake-boot hashes and one cmake hash: https://dpaste.com/8GGM6P9BF.txt 15:03:11
@winterqt:nixos.devWinter (she/her)
In reply to @trofi:matrix.org

You think cmake should be rebuild less? Or more?

glibc's is probably a bit different as it's a part of stdenv.cc.libc and mainly used by that I would guess. Also, if depends if the package is used or not by other packages in the derivation would affect rebuild count as well.

I have no particular opinion, I'm just curious how that happens.
21:22:09
@winterqt:nixos.devWinter (she/her) Oh, for clarification, I was talking about cmake-boot. 21:22:19
@winterqt:nixos.devWinter (she/her) (which is cmake in the stdenv stages) 21:22:29
@winterqt:nixos.devWinter (she/her)see the line i linked21:22:36
@trofi:matrix.orgtrofi AFAIU cmake = cmakeMinimal is only for stage1-4 (first build: bootstrapTools -> cmake-boot in pastebin). Last stage uses cmake as is. Also note that cmakeMinimal is used by zstd (used by final stage, does second build: stage4 -> cmake-boot -> zstd in pastebin). 21:44:31
@trofi:matrix.orgtrofi I used the following command to grep through the full depgraph: $ nix-store --query --graph $(nix-instantiate -A stdenv --argstr system x86_64-darwin) 21:45:39
10 Aug 2022
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17 Aug 2022
@trofi:matrix.orgtrofi Quiz question: for a final glibc used in nixpkgs all over the place which gcc you think is used to build it on linux? a) Possible answers: gcc from bootstrap tools b) gcc from nixpkgs. 17:36:21

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