The nix author created utility called patchelf which is used by nix all the time during the build (to rewrite library paths). As far as I know it creates a new

The nix author created utility called patchelf which is used by nix all the time during the build (to rewrite library paths). As far as I know it creates a new elf each time it is called (it doesn't modify a file on place) so the length of library name is not an issue.