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Nixpkgs Stdenv

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14 Feb 2026
@r_i_s:matrix.orgris_i seeee18:02:04
@r_i_s:matrix.orgris_ yeah i just think it's weird, people will expect that setting hardeningDisable = ["libcxxhardeningfast"]; to actually disable it 18:02:58
@r_i_s:matrix.orgris_ * yeah i just think it's weird, people will expect setting hardeningDisable = ["libcxxhardeningfast"]; to actually disable it 18:47:29
@emilazy:matrix.orgemilymight be good to support hardeningDisable adding flags? but if we control it with the build-time default + cflags maybe it can just be an override in pkgsExtraHardening and not need the hardening* machinery at all20:34:31
15 Feb 2026
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16 Feb 2026
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18 Feb 2026
@r_i_s:matrix.orgris_that's interesting - https://hydra.nixos.org/build/319824740 - since 2026-01-22 we've always been able to find pacret instructions in our aarch64 binaries22:22:07
@r_i_s:matrix.orgris_whether we've got the flag enabled or not22:22:30
@r_i_s:matrix.orgris_and the weird thing is it's for both clang and gcc22:22:47
@r_i_s:matrix.orgris_does this correspond to the gcc 15 switch?22:26:58
19 Feb 2026
@r_i_s:matrix.orgris_ on closer inspection it looks like paciaspis being added to just _init and _fini when "disabled" 19:16:46
@emilazy:matrix.orgemilythose are hand-written assembly, right?19:21:54
@r_i_s:matrix.orgris_beyond my understanding19:33:47
@r_i_s:matrix.orgris_my solution https://github.com/NixOS/nixpkgs/pull/49222119:34:32
21 Feb 2026
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22 Feb 2026
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23 Feb 2026
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24 Feb 2026
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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

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