| 25 Nov 2025 |
 megmug | Aha - could this possibly affect non-module projects as well then? Because I am still getting errors despite removing all the modules. clang-scan-deps fails to find some stuff (on macos). | 11:37:28 |
 Randy Eckenrode | If it uses clang-scan-deps, it will be broken. | 11:39:02 |
| Randy Eckenrode | Also clangd. | 11:39:10 |
| Randy Eckenrode | You may be able to work around it by setting env.NIX_CFLAGS_COMPILE to -isystem ${stdenv.cc.libcxx}. | 11:42:42 |
| Randy Eckenrode | * You may be able to work around it by setting env.NIX_CFLAGS_COMPILE to -isystem ${stdenv.cc.libcxx}/include/c++/v1. | 11:43:01 |
| Randy Eckenrode | (Path from memory, so may be off.) | 11:43:14 |
| megmug | Hm, or just build the nix-shell on a different version maybe? Is the change already on master branch? Or can i go back far enough to get a version that didn't have the problem? | 11:44:38 |
| Randy Eckenrode | It’s on staging. It won’t make it to master until mid-December probably. | 11:47:04 |
| Randy Eckenrode | If you use staging, you’ll have to do a stdenv bootstrap and build everything from source. | 11:47:43 |
| megmug | Do I understand correctly that the breaking change was merged on oct 9? Could it be circumvented by going back further than that? | 11:52:20 |
| megmug | On the other hand, building everything from source might not be that bad as long as it's automatic | 11:53:09 |
| Randy Eckenrode | That should also work. | 11:56:55 |
| Randy Eckenrode | It is. It just takes a while. | 11:57:18 |
| megmug | After waiting for hours to let the machine build the staging commit, i had to discover that my issue persisted. After getting a message from a teammate that the project didn't build for him on an ubuntu Windows-WSL VM, i got suspicious. I thought i had double-checked with nix-shell --pure that it would build on other machines. And i was even using ubuntu for the test. It turns out we were missing a dependency. After adding pkgs.clang-tools into the nix-shell packages, the issue was resolved for the teammate and also on the Mac! I learned that it can be really difficult to make things work across different OSes and architectures. Without Nix it would without a doubt be a lot more difficult, though. | 22:41:44 |
| megmug | BTW, K900 , everything seems to work now including modules. Maybe our use case is simple enough for the existing system to handle it, but at least some amount of module support (using clang) is apparantly there now. | 22:48:33 |
| 26 Nov 2025 |
|  @masrlinu:matrix.org joined the room. | 19:19:47 |
 Sarah Clark | Are there any plans to land the pyarrow fixes for Darwin any time soon? Pretty much any python package in the AI space depends on it and the Hydra failure numbers for Darwin are alarming. | 21:55:38 |
