devel/at-spi2-core build broken on Linux (Fedora 35)

[Nikita Ronja Gillmann <nikita%klang.is@localhost>]

Hi,

building wip/gnunet, which pulls in devel/libextractor, reveals that
devel/at-spi2-core won't build currently, without looking further into
it:

Program glib-genmarshal found: YES (/usr/pkg/bin/glib-genmarshal)
Program glib-mkenums found: YES (/usr/pkg/bin/glib-mkenums)
Program glib-mkenums found: YES (/usr/pkg/bin/glib-mkenums)
Dependency gobject-introspection-1.0 found: YES 1.70.0 (cached)
Dependency gobject-introspection-1.0 found: YES 1.70.0 (cached)
Program g-ir-scanner found: YES (/usr/pkg/bin/g-ir-scanner)
Dependency gobject-introspection-1.0 found: YES 1.70.0 (cached)
Program g-ir-compiler found: YES (/usr/pkg/bin/g-ir-compiler)
Configuring accessibility.conf using configuration
Configuring at-spi-dbus-bus.desktop using configuration
Configuring org.a11y.Bus.service using configuration
Configuring at-spi-dbus-bus.service using configuration
Program dbus-daemon found: YES (/usr/pkg/bin/dbus-daemon)
Program dbus-broker-launch found: YES (/usr/bin/dbus-broker-launch)
WARNING: Found CMake '/usr/work/devel/at-spi2-core/work/.tools/bin/false' but couldn't run it
Found CMake: NO
Run-time dependency libsystemd found: NO (tried pkgconfig)

bus/meson.build:75:2: ERROR: Dependency "libsystemd" not found, tried pkgconfig

A full log can be found at /usr/work/devel/at-spi2-core/work/at-spi2-core-2.40.3/output/meson-logs/meson-log.txt
*** Error code 1

Stop.
bmake[5]: stopped in /usr/pkgsrc/devel/at-spi2-core
*** Error code 1

Stop.
bmake[4]: stopped in /usr/pkgsrc/devel/at-spi2-core
*** Error code 1

Stop.
bmake[3]: stopped in /usr/pkgsrc/devel/at-spi2-atk
*** Error code 1

Stop.
bmake[2]: stopped in /usr/pkgsrc/x11/gtk3
*** Error code 1

Stop.
bmake[1]: stopped in /usr/pkgsrc/devel/libextractor
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/wip/gnunet