Hi Lars,
Lars Böckel <listdump@larf.space> skribis:
> 2) Using a modified QEMU with libvirt. A modified QEMU could help
> sometimes. A way to specify which QEMU package to use would be helpful
> to resolve issues with newer qemu versions or patches which are not
> upstream. While in NixOS you could add patches like this
>
> nixpkgs.config.packageOverrides = pkgs: rec {
> qemu = pkgs.qemu.overrideAttrs (attrs:{
> patches = (lib.filter (x: ! (lib.hasSuffix
> "fix-hda-recording.patch" (builtins.toString x))) attrs.patches) ++ [
> /path/to/qemu.patch ];
> }
> );
> };
>
> to the QEMU package, i don't think this is possible in GuixSD.
As Gábor suggested, you would do it along these lines:
(define qemu-patched
(package
(inherit qemu)
…))
(define custom-libvirt
(package
(inherit libvirt)
(inputs `(("qemu" ,qemu-patched)
,@(alist-delete "qemu" (package-inputs libvirt))))))
(operating-system
;; …
(services (cons (service libvirt-service-type
(libvirt-configuration
(libvirt custom-libvirt)))
%base-services)))
It’s not equivalent to the above Nix snippet because it only affects the
libvirt service, but it addresses this particular need.
HTH,
Ludo’.
