Chimera Linux is a unique from-scratch Linux distribution created in 2021 by Czech Republic Software Engineer q66 that combines the Linux kernel, musl libc, FreeBSD userland, apk package manager, and dinit binary init system. The whole system is built with the LLVM toolchain. The homepage says:
“… It aims to be clean and usable while addressing the various shortcomings of an average Linux distribution.
It does so by liberating itself from the common baggage of most Linux-based systems and doing its own thing. Software is sourced from different places and sometimes written from scratch.”
Chimera Linux Home page
Notably this unholy combination yields a Linux system that is not GNU/Linux. From the about page:
This means Chimera is not a GNU/Linux system, as it utilizes neither GNU utilities, nor GNU libc, nor GNU toolchain. The system is bootstrappable almost entirely without any GNU components (other than
make) and is capable of booting without them (however, most people will have some).

