With the update to glibc 2.38, libcrypt.so.1 is no longer provided by glibc. Libcrypt is an important library for several core system packages that use cryptographic functions, including pam. The library has changed versions, and the legacy version is still available for precompiled or proprietary applications. The new version is available on Void as libxcrypt and the legacy version is libxcrypt-compat.