Nixpkgs Stdenv - Public Room Timeline - Matrix Static

	Nixpkgs Stdenv	187 Members
		59 Servers

You have reached the beginning of time (for this room).

Sender	Message	Time
25 May 2025
Randy Eckenrode	Also, how does it handle `NIX_` vars? Does this even work with Darwin since Darwin needs an SDK?	13:44:42
Tristan Ross	In reply to @reckenrode:matrix.org Also, how does it handle `NIX_` vars? Does this even work with Darwin since Darwin needs an SDK? Suffix salt should work with the env vars. Idk about Darwin but it could be made to work.	14:28:05
Tristan Ross	In reply to @reckenrode:matrix.org How does `crossStdenv` handle cross-compiled dependencies? DXVK needs SPIRV and Vulkan headers and `windows.pthreads`. You'll have to override the stdenv for the dependencies.	14:28:23
Randy Eckenrode	In reply to @rosscomputerguy:matrix.org You'll have to override the stdenv for the dependencies. That doesn’t seem like an improvement.	14:29:31
Tristan Ross	In reply to @reckenrode:matrix.org That doesn’t seem like an improvement. I don't see really any other way of doing cross without either creating a new nixpkgs instance (what we already have) or only provide cross compilation stdenv's	14:30:30
Randy Eckenrode	DXVK uses a custom MinGW (with the Win32 thread model instead of the POSIX one). When you build `dxvk` on Darwin or Linux, it uses the cross-compiled 32- and 64-bit MinGW DLLs. https://github.com/NixOS/nixpkgs/blob/6fb6fd3ceff99de72d881f1a97773647c94e5a82/pkgs/by-name/dx/dxvk/package.nix#L28-L44 DXVK itself has dependencies: `spirv-headers` and `vulkan-headers`. Fortunately, those do not have transitive dependencies. (Arguably, DXVK has more dependencies, but I didn’t bother to de-vendor them.) https://github.com/NixOS/nixpkgs/blob/6fb6fd3ceff99de72d881f1a97773647c94e5a82/pkgs/by-name/dx/dxvk_2/package.nix#L74-L81 The replacement sounds like I need to manually enumerate the transitive dependencies of DXVK, replace all of their `stdenv`s and make sure they get the right dependencies themselves (thankfully easy for DXVK since they have none themselves).	15:08:53
Randy Eckenrode	`crossStdenv` is still expensive, but now the maintainability of my package has gone down because I have more work to do to build my package instead of just referencing `pkgsCross.mingw32.dxvk_2` and `pkgsCross.mingwW64.dxvk_2`.	15:09:59
Randy Eckenrode	Note that it’s not possible to write a function to replace inputs that works in all cases because not all dependencies are in `buildInputs` (or `propagatedBuildInputs`). It’s the same problem that `overrideSDK` had.	15:15:22
Randy Eckenrode	* Note that it’s not possible to write a function to replace inputs that works in all cases because not all dependencies are in `buildInputs` (or `propagatedBuildInputs`). It’s the same problem that `overrideSDK` had. You’ll always need to know what dependencies your inputs have to make sure there are no problems.	15:15:44
Tristan Ross	In reply to @reckenrode:matrix.org Note that it’s not possible to write a function to replace inputs that works in all cases because not all dependencies are in `buildInputs` (or `propagatedBuildInputs`). It’s the same problem that `overrideSDK` had. Yeah, I have thought about a `recursiveStdenvOverride` function which might work here	15:30:31
Tristan Ross	It would go through and apply the new stdenv where it should apply.	15:30:54
Randy Eckenrode	That can’t be done in the general case. Would it be possible to have a function like `yesReallyDoInstantiateAnotherNixpkgsWithStdenc` for non-trivial cases?	15:31:47
Randy Eckenrode	* That can’t be done in the general case. Would it be possible to have a function like `yesReallyDoInstantiateAnotherNixpkgsWithStdenv` for non-trivial cases?	15:31:59
Tristan Ross	Idk	15:32:48
Randy Eckenrode	Thinking about Wine, it has a number of vendored dependencies that would be nice to devendor. It would also be nice to build wine-mono and wine-gecko from source.	15:32:54
Randy Eckenrode	I would not want to have to manually override all the dependencies to build Gecko or Mono.	15:33:22
Tristan Ross	Yeah, it seems like no matter what, cross compilation is always going to be expensive but necessary.	15:34:39

Show newer messages

Back to Room ListRoom Version: 9