Starting Cagebreak as X11 client doesn't work anymore as wlroots 0.13
started to require the DRI3 extension which isn't supported by LLVMpipe:
machine # [ 13.508284] xsession[938]: 00:00:00.003 [ERROR] [backend/x11/backend.c:433] X11 does not support DRI3 extension
machine # [ 13.666989] show_signal_msg: 62 callbacks suppressed
machine # [ 13.666993] .cagebreak-wrap[938]: segfault at 8 ip 0000000000408574 sp 00007ffef76f2440 error 4 in .cagebreak-wrapped[407000+d000]
machine # [ 13.670483] Code: f4 ff ff 4c 8b 84 24 70 01 00 00 8d 45 01 48 89 c5 49 8b 3c c0 48 85 ff 75 e4 4c 89 c7 e8 84 f4 ff ff 48 8b bc 24 18 01 00 00 <48> 8b 47 08 4c 8d 6f d8 48 8d 68 d8 48 39 df 75 0e eb 36 66 0f 1f
machine # [ 13.518274] xsession[938]: 00:00:00.006 [ERROR] [../cagebreak.c:313] Unable to create the wlroots backend
The test broke after updating Cagebreak in #121652 (bf8679ba94).
XWayland still fails for unknown reasons:
Modifiers specified, but DRI is too old
libEGL warning: DRI2: failed to create dri screen
libEGL warning: NEEDS EXTENSION: falling back to kms_swrast
glamor: No eglstream capable devices found
glamor: 'wl_drm' not supported
Missing Wayland requirements for glamor GBM backend
Missing Wayland requirements for glamor EGLStream backend
Failed to initialize glamor, falling back to sw
00:00:03.534 [ERROR] [xwayland/server.c:252] waitpid for Xwayland fork
failed: No child processes
(EE) failed to write to XWayland fd: Broken pipe
/nix/store/kcm3x8695fgycf31grzl9fy5gggwpram-xterm-367/bin/xterm: Xt
error: Can't open display: :0
The fallback to software rendering is to be expected but it looks like
XWayland is crashing with "failed to write to XWayland fd: Broken pipe".
To be able to do LTO with clang we need the LTO-capable llvm-ar from
libllvm.out (== llvmPackages.llvm) which contains a superset of the llvm
bintools. This used to be passed through from stdenv.cc.cc as llvm, but
has been renamed to libllvm in 7869d16545.
llvm-ar would be in stdenv.cc.bintools.bintools provided that we are
using a clang stdenv which uses lld as its linker. In the future we could
thus make this inclusion conditional on stdenv.hostPlatform.linker.
Note that the build of foot.tests still fails, pending resolution of #123361.
`allowKeysForGroup` is no longer available so this drops
```
security.acme.certs."example.com".allowKeysForGroup = true;
```
line. `SupplementaryGroups` should be enough for
allowing access to certificates.
