Already up to date.
==> Making package: libc++abi 3.9.1-1 (Wed Mar 16 01:16:20 2022)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Found libcxxabi-3.9.1.src.tar.xz
  -> Found libcxxabi-3.9.1.src.tar.xz.sig
==> Validating source files with sha512sums...
    libcxxabi-3.9.1.src.tar.xz ... Passed
    libcxxabi-3.9.1.src.tar.xz.sig ... Skipped
==> Verifying source file signatures with gpg...
    libcxxabi-3.9.1.src.tar.xz ... Passed (WARNING: the key has expired.)
==> WARNING: Warnings have occurred while verifying the signatures.
    Please make sure you really trust them.
==> Extracting sources...
  -> Extracting libcxxabi-3.9.1.src.tar.xz with bsdtar
==> Starting prepare()...
==> Removing existing $pkgdir/ directory...
==> Starting build()...
-- Found LLVM_CONFIG as /usr/bin/llvm-config
-- Configuring done
-- Generating done
-- Build files have been written to: /srv/maat/src/libc++abi/src/libcxxabi-3.9.1.src/build
Consolidate compiler generated dependencies of target cxxabi_objects
[  5%] Building CXX object src/CMakeFiles/cxxabi_objects.dir/stdexcept.cpp.o
/srv/maat/src/libc++abi/src/libcxxabi-3.9.1.src/src/stdexcept.cpp:10:10: fatal error: '__refstring' file not found
#include "__refstring"
         ^~~~~~~~~~~~~
1 error generated.
make[2]: *** [src/CMakeFiles/cxxabi_objects.dir/build.make:258: src/CMakeFiles/cxxabi_objects.dir/stdexcept.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:122: src/CMakeFiles/cxxabi_objects.dir/all] Error 2
make: *** [Makefile:136: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...