Try Albin's other PR

Author: oscarbenjamin

bin/build_dependencies_unix.sh

@@ -283,7 +283,7 @@ echo
 #cd flint-$FLINTVER
 git clone https://github.com/albinahlback/flint.git
 cd flint
-git checkout rbit
+git checkout machine_vectors_casts
   ./bootstrap.sh
   # --host=$HOST_ARG\ # host is ignored
   # --enable-arch works on 3.1.3p1, not available  on HEAD

pyproject.toml

@@ -89,7 +89,7 @@ skip = "*-win32 *-manylinux_i686 *-musllinux_*"
 # free-threaded-support = true
 
 manylinux-x86_64-image = "manylinux2014"
-manylinux-aarch64-image = "manylinux2014"
+manylinux-aarch64-image = "manylinux_2_28"
 manylinux-i686-image = "manylinux2014"
 test-command = "python -c \"import flint; print(str(flint.fmpz(2)))\""