Installing nearly any package gives a variant of the following error:
yay
...
-> Extracting gnome-icon-theme-symbolic-3.12.0.tar.xz with bsdtar
==> Sources are ready.
==> Making package: gnome-icon-theme-symbolic 3.12.0-6 (tir 28 feb 2023 17:04:11 CET)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> WARNING: Using existing $srcdir/ tree
==> Starting build()...
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether UID '1000' is supported by ustar format... yes
checking whether GID '1000' is supported by ustar format... yes
checking how to create a ustar tar archive... gnutar
checking for pkg-config... no
checking icon-naming-utils >= 0.8.7... no
configure: error: icon-naming-utils >= 0.8.7 is required to build and install gnome-icon-theme-symbolic
==> ERROR: A failure occurred in build().
Aborting...
error: target not found: gnome-icon-theme-symbolic
error: target not found: protonvpn-gui
-> error making: gnome-icon-theme-symbolic