Currently it is only possible to add upstream _system_ units. The option
systemd.additionalUpstreamSystemUnits can be used for this.
However, this was not yet possible for systemd.user. In a similar
fashion this was added to systemd-user.nix.
This is intended to have other modules add upstream units.
As of systemd/systemd@e908434458,
systemd-networkd now automatically configures routes to addresses
specified in AllowedIPs unless explicitly disabled with
"RouteTable=off".
When initializing a system (e.g. first boot / livecd) we have no good
reference source for time. systemd-timesyncd however would revert back
to its configured fallback time (in our case 01.01.1980). Since we
probably don't want to hardcode a specific date as fallback we are now
using the current system time (wherever that might have come from) to
initialize the reference clock file.
The only systems that might be remotely affected by this change are
machines that have highly unreliable RTCs or those where the battery
that backs the RTC is running empty.
Historically these systems always had a tough time with anything time
related and likely required manual intervention.
For stateless systems (those that wipe / between reboots or our
installer CDs) this has the consequence that time will always be reset
to whatever the system comes up with on boot. This is likely the correct
time coming from an RTC. No harm done here the situation is likely
unchanged for them.
For stateful systems (those that retain the / partition across reboots)
there shouldn't be a change at all. They'll provide an initial clock
value once on their lifetime (during first boot / after installation).
From then onwards systemd-timesyncd will update the file with the newer
fallback time (that will be picked up on the next boot).
This effectively fixes the majority of all VM tests which were broken
because `/dev/vda` (or any other block device) wasn't mountable:
machine # mounting /dev/vda on /...
machine # mount: mounting /dev/vda on /mnt-root/ failed: No such device[ 2.820976] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100
machine # [ 2.821757] CPU: 0 PID: 1 Comm: init Not tainted 5.10.72 #1-NixOS
machine # [ 2.821757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
machine # [ 2.821757] Call Trace:
machine # [ 2.821757] dump_stack+0x6b/0x83
machine # [ 2.821757] panic+0x101/0x2c8
machine # [ 2.821757] do_exit.cold+0x14/0xb3
machine # [ 2.821757] do_group_exit+0x33/0xa0
machine # [ 2.821757] __x64_sys_exit_group+0x14/0x20
machine # [ 2.821757] do_syscall_64+0x33/0x40
machine # [ 2.821757] entry_SYSCALL_64_after_hwframe+0x44/0xa9
machine # [ 2.821757] RIP: 0033:0x7f67ec2800f6
machine # [ 2.821757] Code: 00 4c 8b 0d 2c 5d 11 00 eb 19 66 2e 0f 1f 84 00 00 00 00 00 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 22 f4 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e2 f7 d8 64 41 89 01 eb da 66 2e 0f 1f 84 00
machine # [ 2.821757] RSP: 002b:00007fff8f5a71d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
machine # [ 2.821757] RAX: ffffffffffffffda RBX: 0000000000699704 RCX: 00007f67ec2800f6
machine # [ 2.821757] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
machine # [ 2.821757] RBP: 0000000000000004 R08: 00000000000000e7 R09: ffffffffffffff80
machine # [ 2.821757] R10: 00007f67ec33f3e0 R11: 0000000000000202 R12: 000000000000000b
machine # [ 2.821757] R13: 00007fff8f5a75a8 R14: 0000000000000000 R15: 00000000004fc198
machine # [ 2.821757] Kernel Offset: 0x31e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
machine # [ 2.821757] Rebooting in 1 seconds..
This happened because the kernel failed to load modules such as `ext4`
from `boot.initrd.availableKernelModules`[1] on e.g. a `mount(2)` syscall.
The problem is that `kmod` isn't linked against `libpthread.so.0`
anymore because it got merged into `libc.so.6` (however, the .so still
exists), but still needs it:
machine # newfstatat(AT_FDCWD, "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.34-36/lib/x86_64", 0x7ffd951114c0, 0) = -1 ENOENT (No such file or directory)
machine # openat(AT_FDCWD, "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.34-36/lib/x86_64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
machine # newfstatat(AT_FDCWD, "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.34-36/lib/x86_64", 0x7ffd951114c0, 0) = -1 ENOENT (No such file or directory)
machine # openat(AT_FDCWD, "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.34-36/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
machine # newfstatat(AT_FDCWD, "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.34-36/lib", 0x7ffd951114c0, 0) = -1 ENOENT (No such file or directory)
machine # openat(AT_FDCWD, "/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.34-36/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
machine # writev(2, [{iov_base="/nix/store/kdc9n48ksdc1a8y8w512w"..., iov_len=69}, {iov_base=": ", iov_len=2}, {iov_base="error while loading shared libra"..., iov_len=36}, {iov_base=": ", iov_len=2}, {iov_base="libpthread.so.0", iov_len=15}, {iov_base=": ", iov_len=2}, {iov_base="cy
machine # ) = 184
machine # exit_group(127) = ?
machine # +++ exited with 127 +++
machine # mount: mounting /dev/vda on /mnt-root/ failed: No such device
machine # [ 19.167180] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100
machine # [ 19.167711] CPU: 0 PID: 1 Comm: init Not tainted 5.10.72 #1-NixOS
This is not a problem
* inside stage-1 because `LD_LIBRARY_PATH` points to `$out/lib` of
extra-utils where `libpthread.so.6` also exists.
* on a running system because `${pkgs.glibc}/lib` is part of kmod's
rpath.
However this is a problem inside the kernel which calls `modprobe` (in
our case `kmod`) to load modules and doesn't know about
`LD_LIBRARY_PATH`. Also, the rpath-reference was nuked.
To work around this, the kernel's `modprobe`
(i.e. `/proc/sys/kernel/modprobe`) now points to a wrapper which
explicitly declares `LD_LIBRARY_PATH`. We can't use `makeWrapper` here
because `modprobe` itself must not be renamed. Otherwise, `kmod` (which
is the link-target of `modprobe`) won't work because it expects
`argv[0] == "modprobe"` to perform modprobe's tasks.
[1] https://nixos.org/manual/nixos/stable/options.html#opt-boot.initrd.availableKernelModules
wtmp and btmp are created by systemd, so the rules are more appropriate there.
They can be disabled explicitly with something like
services.ogrotate.paths = {
"/var/log/btmp".enable = false;
"/var/log/wtmp".enable = false;
};
if required.
The mount options need to be passed as a comma-separated list of options so that they
end up one a single Options line in the resulting mount unit.
The current code passed the options as a list, resulting in several Options lines in
the mount unit, all but the first of these were ignored by systemd however.
This behaviour is not clearly defined in the systemd man page.
The `nix.*` options, apart from options for setting up the
daemon itself, currently provide a lot of setting mappings
for the Nix daemon configuration. The scope of the mapping yields
convience, but the line where an option is considered essential
is blurry. For instance, the `extra-sandbox-paths` mapping is
provided without its primary consumer, and the corresponding
`sandbox-paths` option is also not mapped.
The current system increases the maintenance burden as maintainers have to
closely follow upstream changes. In this case, there are two state versions
of Nix which have to be maintained collectively, with different options
avaliable.
This commit aims to following the standard outlined in RFC 42[1] to
implement a structural setting pattern. The Nix configuration is encoded
at its core as key-value pairs which maps nicely to attribute sets, making
it feasible to express in the Nix language itself. Some existing options are
kept such as `buildMachines` and `registry` which present a simplified interface
to managing the respective settings. The interface is exposed as `nix.settings`.
Legacy configurations are mapped to their corresponding options under `nix.settings`
for backwards compatibility.
Various options settings in other nixos modules and relevant tests have been
updated to use structural setting for consistency.
The generation and validation of the configration file has been modified to
use `writeTextFile` instead of `runCommand` for clarity. Note that validation
is now mandatory as strict checking of options has been pushed down to the
derivation level due to freeformType consuming unmatched options. Furthermore,
validation can not occur when cross-compiling due to current limitations.
A new option `publicHostKey` was added to the `buildMachines`
submodule corresponding to the base64 encoded public host key settings
exposed in the builder syntax. The build machine generation was subsequently
rewritten to use `concatStringsSep` for better performance by grouping
concatenations.
[1] - https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md
This option behaves exactly like `boot.extraModprobeConfig`, except that it also includes the generated modprobe.d file in the initrd.
Many years ago, someone tried to include the normal modprobe.d/nixos.conf file generated by `boot.extraModprobeConfig` in the initrd: 0aa2c1dc46. This file contains a reference to a directory with firmware files inside. Including firmware in the initrd made it too big, so the commit was reverted again in 4a4c051a95.
The `boot.extraModprobeConfig` option not changing the initrd caused me much confusion because I tried to set the maximum cache size for ZFS and it didn't work.
Closes https://github.com/NixOS/nixpkgs/issues/25456.
I was confused why I couldn't find a mention of udev.log_priority in
systemd-udevd.service(8). It turns out that it was renamed[1] to
udev.log_level. The old name is still accepted, but it'll avoid
further confusion if we use the new name in our documentation.
[1]: 64a3494c3d
Add `shellDryRun` to the generic stdenv and substitute it for uses of
`${stdenv.shell} -n`. The point of this layer of abstraction is to add
the flag `-O extglob`, which resolves#126344 in a more direct way.
some options have default that are best described in prose, such as
defaults that depend on the system stateVersion, defaults that are
derivations specific to the surrounding context, or those where the
expression is much longer and harder to understand than a simple text
snippet.
Add `systemd.network.networks.*.dhcpServerStaticLeaseConfig` to allow
for configuring static DHCP leases through the `[DHCPServerStaticLease]`
section. See systemd.network(5) of systemd 249 for details.
Also adds the NixOS test `systemd-networkd-dhcpserver-static-lease` to
test the assignment of static leases.
The regexp was only matching numbers and not the '.', so everyone using
systemd-boot would always see `could not find any previously installed
systemd-boot` on a `nixos-rebuild`.
Some specialisations (such as those which affect various boot-time
attributes) cannot be switched to at runtime. This allows picking the
specialisation at boot time.
/etc/crypttab can contain the _netdev option, which adds crypto devices
to the remote-cryptsetup.target.
remote-cryptsetup.target has a dependency on cryptsetup-pre.target. So
let's add both of them.
Currently, one needs to manually ssh in and invoke `systemctl start
systemd-cryptsetup@<name>.service` to unlock volumes.
After this change, systemd will properly add it to the target, and
assuming remote-cryptsetup.target is pulled in somewhere, you can simply
pass the passphrase by invoking `systemd-tty-ask-password-agent` after
ssh-ing in, without having to manually start these services.
Whether remote-cryptsetup.target should be added to multi-user.target
(as it is on other distros) is part of another discussion - right now
the following snippet will do:
```
systemd.targets.multi-user.wants = [ "remote-cryptsetup.target" ];
```
allows configuration of foo-over-udp decapsulation endpoints. sadly networkd
seems to lack the features necessary to support local and peer address
configuration, so those are only supported when using scripted configuration.
Checks whether all spaces are inside double quotes, thus ensuring that one
string parses as no more than one kernel param.
Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>
On some systems bootctl cannot write the `LoaderSystemToken` EFI variable
during installation, which results in a failure to install the boot
loader. Upstream provides a flag (--graceful) to ignore such write failures -
this change exposes it as a configuration option.
As the exact semantics of this option appear to be somewhat volatile it
should be used only if systemd-boot otherwise fails to install.
The multipath-tools package had existed in Nixpkgs for some time but
without a nixos module to configure/drive it. This module provides
attributes to drive the majority of multipath configuration options
and is being successfully used in stage-1 and stage-2 boot to mount
/nix from a multipath-serviced iSCSI volume.
Credit goes to @grahamc for early contributions to the module and
authoring the NixOS module test.
Fixes:
```
activating the configuration...
warning: user ‘systemd-coredump’ has unknown group ‘systemd-coredump’
setting up /etc...
```
Oversight of #133166
- boost 167 removed on staging-next (7915d1e03f) × boost attributes are inherited on staging (d20aa4955d)
- linux kernels were moved to linux-kernels.nix on staging-next (c62f911507) × hardened kernels are versioned on staging (a5341beb78) + removed linux_5_12 (e55554491d)
- conflict in node-packages – I regenerated it using node2nix from nixos-unstable (does not build on staging)
The main goal of this commit is to replace the rather fragile passing of
multiple arrays which could break in cases like #130935.
While I could have just added proper shell escaping to the variables
being passed, I opted for the more painful approach of replacing the
fragile and somewhat strange construct with the 5 bash lists. While
there are currently no more problems present with the current approach
(at least none that I know of), the new approach seems more solid and
might get around problems that could arise in the future stemming from
either the multiple-lists situation or from the absence of proper shell
quoting all over the script.
systemd-coredump tries to drop privileges to a systemd-coredump user if
present (and falls back to the root user if it's not available).
Create that user, and recycle uid 151 for it. We don't really care about
the gid.
Fixes https://github.com/NixOS/nixpkgs/issues/120803.
This modifies initialRamdiskSecretAppender to stage secrets in
/.initrd-secrets/ and stage-1-init to copy them into place after mounting
special file systems. This allows secrets to be copied into ramfs mounts
like /run/keys for use after stage-1 finishes without copying them to disk
(which would not be very secure).
- The order of NSS (host) modules has been brought in line with upstream
recommendations:
- The `myhostname` module is placed before the `resolve` (optional) and `dns`
entries, but after `file` (to allow overriding via `/etc/hosts` /
`networking.extraHosts`, and prevent ISPs with catchall-DNS resolvers from
hijacking `.localhost` domains)
- The `mymachines` module, which provides hostname resolution for local
containers (registered with `systemd-machined`) is placed to the front, to
make sure its mappings are preferred over other resolvers.
- If systemd-networkd is enabled, the `resolve` module is placed before
`files` and `myhostname`, as it provides the same logic internally, with
caching.
- The `mdns(_minimal)` module has been updated to the new priorities.
If you use your own NSS host modules, make sure to update your priorities
according to these rules:
- NSS modules which should be queried before `resolved` DNS resolution should
use mkBefore.
- NSS modules which should be queried after `resolved`, `files` and
`myhostname`, but before `dns` should use the default priority
- NSS modules which should come after `dns` should use mkAfter.
binfmt activation script creates /run/binfmt before mounting /run
when system activation.
To fix it I added dependency to specialfs to binfmt activation
script.
os.readlink only resolves one layer of symlinks. This script explicitly relies on the real path of a file for deduplication, hence symlink resolution should recurse.
Previously the code took the kernelPatches of the final derivation, which
might or might not be what was passed to the derivation in the original call.
The previous behaviour caused various hacks to become neccessary to avoid duplicates in kernelPatches.
`systemd.network.networks.*.dhcpServerConfig` did not accept all of
the options which are valid for networkd's [DHCPServer] section. See
systemd.network(5) of systemd 247 for details.
Since 03eaa48 added perl.withPackages, there is a canonical way to
create a perl interpreter from a list of libraries, for use in script
shebangs or generic build inputs. This method is declarative (what we
are doing is clear), produces short shebangs[1] and needs not to wrap
existing scripts.
Unfortunately there are a few exceptions that I've found:
1. Scripts that are calling perl with the -T switch. This makes perl
ignore PERL5LIB, which is what perl.withPackages is using to inform
the interpreter of the library paths.
2. Perl packages that depends on libraries in their own path. This
is not possible because perl.withPackages works at build time. The
workaround is to add `-I $out/${perl.libPrefix}` to the shebang.
In all other cases I propose to switch to perl.withPackages.
[1]: https://lwn.net/Articles/779997/
Adding template overrides allows for custom behavior for specific
instances of a template. Previously, it was not possible to provide
bind mounts for systemd-nspawn. This change allows it.
Currently, kernel config options whose value is "yes" always override
options whose value is "no".
This is not always desired.
Generally speaking, if someone defines an option to have the value
"no", presumably they are disabling the option for a reason, so it's
not always OK to silently enable it due to another, probably unrelated
reason.
For example, a user may want to reduce the kernel attack surface and
therefore may want to disable features that are being enabled in
common-config.nix.
In fact, common-config.nix was already silently enabling options that
were intended to be disabled in hardened/config.nix for security
reasons, such as INET_DIAG.
By eliminating the custom merge function, these config options will
now use the default module option merge functions which make sure
that all options with the highest priority have the same value.
A user that wishes to override an option defined in common-config.nix
can currently use mkForce or mkOverride to do so, e.g.:
BINFMT_MISC = mkForce (option no);
That said, this is not going to be necessary in the future, because
the plan is for kernel config options defined in nixpkgs to use a
lower priority by default, like it currently happens for other module
options.
Catch and ignore errors during writing of the boot entries. These
errors could stem from profile names that are not valid filenames on
vfat filesystems.
fixes#114552
The BGRT theme is probably a close as to "FlickerFree" we can
get without https://github.com/NixOS/nixpkgs/pull/74842.
It's more agnostic than the Breeze theme.
We also install all of themes provided by the packages, as it's possible
that one theme needs the ImageDir of another, and they're small files
anyways.
Lastly, how plymouth handles logo and header files is
a total mess, so hopefully when they have an actual release
we won't need to do all this symlinking.
This allows Plymouth to show the “NixOS 21.03” label under the logo at
startup like it already does at shutdown.
Fixes#59992.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Renaming an interface must be done in stage-1: otherwise udev will
report the interface as ready and network daemons (networkd, dhcpcd,
etc.) will bring it up. Once up the interface can't be changed and the
renaming will fail.
Note: link files are read directly by udev, so they can be used even
without networkd enabled.
It was introduced in c10fe14 but removed in c4f910f.
It remained such that people with older generations in their boot
entries could still boot those. Given that the parameter hasn't had any
use in quite some years, it seems safe to remove now.
Fixes#60184
`unitOption` is only used inside of `attrsOf` wich is perfectly capable of
handling the attrsets from `mkIf`, though the checkUnitConfig test
forbids it. This commit weakens that restriction to allow the usage of
`mkIf` inside of `systemd.services.<name>.serviceConfig.<something>`
etc.
networkd's [IPv6PrefixDelegation] section and IPv6PrefixDelegation=
options have been renamed as [IPv6SendRA] and IPv6SendRA= in systemd
247.
Throws if the deprecated option ipv6PrefixDelegationConfig is used.
The `platform` field is pointless nesting: it's just stuff that happens
to be defined together, and that should be an implementation detail.
This instead makes `linux-kernel` and `gcc` top level fields in platform
configs. They join `rustc` there [all are optional], which was put there
and not in `platform` in anticipation of a change like this.
`linux-kernel.arch` in particular also becomes `linuxArch`, to match the
other `*Arch`es.
The next step after is this to combine the *specific* machines from
`lib.systems.platforms` with `lib.systems.examples`, keeping just the
"multiplatform" ones for defaulting.
Declaring them as lists enables the concatenation, supporting
lib.mkBefore, lib.mkOrder, etc.
This is useful when you need to extend a service with a pre-start
script that needs to run as root.
Originally, changes to the kernel don't propagate to the other
derivation within the same package set. This commit allows for the
changes in the kernel to be propagated.
A distinct example is setting `boot.kernel.randstructSeed` to a non-zero
length string which would result in building 2 kernels, one with the
correct seed and the other with the zero length seed. Then, when using
an out-of-tree kernel driver, it would be built with the zero length
seed which differs from the non-zero length seed used to boot,
contradicting the purpose of the `boot.kernel.randstructSeed`.
For in NixOS it is beneficial if both plasma5 and pam use the same Qt5
version. Because the plasma5 desktop may use a different version as the
default Qt5 version, we introduce plasma5Packages.
https://github.com/NixOS/nixpkgs/pull/107497 broke booting on many systems that
use tmpOnTmpfs due to the lack of specifying the mount type.
This commit explicitly adds the mount type, which should fix booting
such systems.
The original change may want to be revisited however too.
@poettering decided we only need a limited number of inodes in our /tmp,
so why not limit that for every systemd user? That makes medium-sized nix
builds impossible so this commit restores the old behaviour which is the
kernel default of half the number of physical RAM pages which does not
seem too unreasonable to me.
See https://www.redhat.com/sysadmin/fedora-31-control-group-v2 for
details on why this is desirable, and how it impacts containers.
Users that need to keep using the old cgroup hierarchy can re-enable it
by setting `systemd.unifiedCgroupHierarchy` to `false`.
Well-known candidates not supporting that hierarchy, like docker and
hidepid=… will disable it automatically.
Fixes#73800
This used to be done by udev, but that was removed in
systemd/systemd@6b2229c. The links are created by systemd at the end of
stage-2, but activation scripts might need them earlier.
These were broken since 2016:
f0367da7d1
since StartLimitIntervalSec got moved into [Unit] from [Service].
StartLimitBurst has also been moved accordingly, so let's fix that one
too.
NixOS systems have been producing logs such as:
/nix/store/wf98r55aszi1bkmln1lvdbp7znsfr70i-unit-caddy.service/caddy.service:31:
Unknown key name 'StartLimitIntervalSec' in section 'Service', ignoring.
I have also removed some unnecessary duplication in units disabling
rate limiting since setting either interval or burst to zero disables it
(ad16158c10/src/basic/ratelimit.c (L16))
When the stage-1 logs get imported in to the journal, they all get
loaded with the same timestamp. This makes it difficult to identify
what might be taking a long time in early boot.
It looks like the test sshd key can never be used, because of too open
permissions. My guess is that the current test script works fine once
the user defined ssh-key has been copied into initrd.
At "nixos-install" however, the user specified host key is not present
in initrd yet and validation fails.
fixes#91486
Otherwise, stage-2-init.sh will complain about not having access to
/dev/fd/62 as of systemd v246.
On IRC, flokli said:
15:14 <flokli> cole-h: hmmm... I could imagine some of the setup inside /dev has been moved into other parts of systemd
15:14 <flokli> And given we run systemd much later (outside initramfs only) it doesn't work properly here
15:17 <flokli> We probably don't invoke udev correctly
This is a temporary fix for #97433. A more proper fix has been
implemented upstream in systemd/systemd#17001, however until it gets
backported, we are stuck with ignoring the error.
After the backport lands, this commit should be reverted.
For UEFI setups, "device" will generally be the special value "nodev"
which represents not running grub-install at all. Using "nodev" for
boot mirrors should therefore be allowed.
The commit enforces buildPackages in the builder but neglects
the fact that the builder is intended to run on the target system.
Because of that, the builder will fail when remotely building a
configuration eg. with nixops or nix-copy-closure.
This reverts commit a6ac6d00f9.
The cyclic dependency of systemd → cryptsetup → lvm2 → udev=systemd
needs to be broken somewhere. The previous strategy of building
cryptsetup with an lvm2 built without udev (#66856) caused the
installer.luksroot test to fail. Instead, build lvm2 with a udev built
without cryptsetup.
Fixes#96479.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
This allows the user to configure systemd tmpfiles.d via
`environment.etc."tmpfiles.d/X.conf".text = "..."`, which after #93073
causes permission denied (with new X.conf):
```
ln: failed to create symbolic link '/nix/store/...-etc/etc/tmpfiles.d/X.conf': Permission denied
builder for '/nix/store/...-etc.drv' failed with exit code 1
```
or collision between environment.etc and systemd-default-tmpfiles
packages (with existing X.conf, such as tmp.conf):
```
duplicate entry tmpfiles.d/tmp.conf -> /nix/store/...-etc-tmp.conf
mismatched duplicate entry /nix/store/...-systemd-246/example/tmpfiles.d/tmp.conf <-> /nix/store/...-etc-tmp.conf
builder for '/nix/store/...-etc.drv' failed with exit code 1
```
Fixes#96755
declare -a is not sufficient to make the array variable actually
exist, which resulted in the script failing when the target object did
not have any DT_NEEDED entries. This in turn resulted in some
initramfs libraries not having their rpaths patched to point to
extra-utils, which in turn broke the extra-utils tests.
