I build it with makepkg -e command.
I don't get what is wrong, I have never work with Rast
Erorrs are
FAILED: root_store_tool
...
ld.lld: error: undefined symbol: __rustc::__rust_dealloc
>>> referenced by alloc-cd7ee16f1f146a6d.alloc.de3a53fde362ebcd-cgu.0.rcgu.o:(core::iter::traits::iterator::Iterator::collect::h8a5ec3bd2ee2184d) in archive prebuilt_rustc_sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc.rlib
>>> referenced by alloc-cd7ee16f1f146a6d.alloc.de3a53fde362ebcd-cgu.0.rcgu.o:(_$LT$alloc..borrow..Cow$LT$str$GT$$u20$as$u20$core..ops..arith..AddAssign$LT$$RF$str$GT$$GT$::add_assign::h6501deb6224d3dcf) in archive prebuilt_rustc_sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc.rlib
>>> referenced by gimli-f8518c1d0c857b24.gimli.883c8ed68c982eec-cgu.0.rcgu.o:(alloc::collections::btree::node::Handle$LT$alloc..collections..btree..node..NodeRef$LT$alloc..collections..btree..node..marker..Mut$C$K$C$V$C$alloc..collections..btree..node..marker..Leaf$GT$$C$alloc..collections..btree..node..marker..KV$GT$::split::hb377df9b221e8a4d) in archive prebuilt_rustc_sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli.rlib
...
ld.lld: error: undefined symbol: __rustc::__rust_alloc_error_handler
>>> referenced by alloc-cd7ee16f1f146a6d.alloc.de3a53fde362ebcd-cgu.0.rcgu.o:(alloc::alloc::handle_alloc_error::hd65e4c475d70abb0) in archive prebuilt_rustc_sysroot/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc.rlib