I merged the newest nixos-unstable (0ea7a8f1b939d74e5df8af9a8f7342097cdf69eb) and tried building mangohud but it tries to build a kernel:
these 15 derivations will be built:
/nix/store/g2zb66qgrw50xa90i5ha2pdca4as570n-linux-5.15.51.drv
/nix/store/zclv7x9jf98krzcahcpxln802mbi9dxg-libXNVCtrl-390.151.drv
/nix/store/qry6fv29ab8x75afqrmdqmfyg10md6d6-mangohud-0.6.7-1.drv
/nix/store/bds00q83hg59dbpa0h20f804v8sdb6g9-opengl32-nix-workaround.patch.drv
/nix/store/3csrfq65glsyx5793294as3fl4i5lrn5-mangohud-0.6.7-1.drv
/nix/store/9j7w9vm6aqmq86cky06z39w2i2fycr7p-system-path.drv
/nix/store/6cblakq2mrx90b3r0y39g4v2x7w0l9gm-dbus-1.drv
/nix/store/cf65q802sr2yqx0r0af4c1y25avhl8ni-unit-systemd-fsck-.service.drv
/nix/store/k8bzdv11a671bxfr433xx8rkxml17118-unit-dbus.service.drv
/nix/store/jyki39avhb5m0jv5q82rhnpdyrpbx03c-user-units.drv
/nix/store/lvmnjn52lyfp62g03zc1fwa1mijpydcr-unit-polkit.service.drv
/nix/store/rm837c30fa3h3f6dnjk05jjbsicc70kg-unit-dbus.service.drv
/nix/store/md34xawyzyzmfgb9gpd465g84s0whd95-system-units.drv
/nix/store/g2fmn1rs906xc6h3vsxvgxavpl46mkyj-etc.drv
/nix/store/ixg81v7a4y8iag9as50isvkc5yx6y7w6-nixos-system-HEPHAISTOS-22.11.git.604a9efcc68.drv
building '/nix/store/g2zb66qgrw50xa90i5ha2pdca4as570n-linux-5.15.51.drv'...
Chain goes like this mangohud → mangohud32 → libXNVCtrl → nvidia_x11_390 → linuxPackages.kernel, that’s undesirable but at least understandable.
However, according to Hydra - Build 182191578 of job nixpkgs:trunk:mangohud.x86_64-linux, it should be cached? 3csrfq65glsyx5793294as3fl4i5lrn5 is the output path’s hash, as listed in the details tab and yet:
$ curl https://cache.nixos.org/3csrfq65glsyx5793294as3fl4i5lrn5.narinfo
<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>AK2DGGCJ8ZJC5V4W</RequestId><HostId>YcJN7m6v+qZRmpLiMIjijoxUztqyitlwNJOohy4veslx72eTdAPm3iaFuZhWNy2k03yDYT9iu7o=</HostId></Error>
Someone else was having problems with WINE not being cached in the NixOS matrix channel earlier too.
Has something gone awry w.r.t. i686 builders?