It seems very minimal but supports my requirements. It makes sense to me, because everything gets installed (usually via make install) to ~/.local/pkg/foo-1.0/ and the like, and then symlinks are created to, say, ~/.local/{bin,etc,include,lib,man,share,var}. According to the source code, it is configurable via environment variables. It seems to share similarities with GNU's stow.
https://zolk3ri.name/cgit/zpkg/
It seems very minimal but supports my requirements. It makes sense to me, because everything gets installed (usually via make install) to ~/.local/pkg/foo-1.0/ and the like, and then symlinks are created to, say, ~/.local/{bin,etc,include,lib,man,share,var}. According to the source code, it is configurable via environment variables. It seems to share similarities with GNU's stow.