APT package installation on Kali Rolling is currently failing due to repository metadata referencing package versions that are no longer available on mirrors.

This affects both regular package installation and apt build-dep.

Observed failures include:

libexpat1
libexpat1-dev
autoconf
multiple gcc-16 runtime packages (libasan8, libgomp1, libtsan2, etc.)

The issue appears to be caused by repository synchronization inconsistency between package indexes and mirror contents.

Steps to Reproduce
apt build-dep xorg-server
Actual Result

APT downloads a large number of dependencies successfully, but several packages fail with HTTP 404 errors.

Examples:

Error: Failed to fetch http://http.kali.org/kali/pool/main/e/expat/libexpat1_2.8.0-1_amd64.deb
404 Not Found

Error: Failed to fetch http://http.kali.org/kali/pool/main/a/autoconf/autoconf_2.72-6_all.deb
404 Not Found

Error: Failed to fetch http://http.kali.org/kali/pool/main/g/gcc-16/libcc1-0_16-20260322-1_amd64.deb
404 Not Found

Error: Failed to fetch http://http.kali.org/kali/pool/main/g/gcc-16/libgomp1_16-20260322-1_amd64.deb
404 Not Found

Additional missing packages include:

libitm1
libatomic1
libasan8
liblsan0
libtsan2
libubsan1
libhwasan0
libquadmath0

APT eventually aborts with:

Error: Failed to process build dependencies