stripping (with flags -S) in  /nix/store/ljsjh9hgyrbs5i0iw2sd8wvcq463hqy8-sdf-library/lib 
strip: /nix/store/ljsjh9hgyrbs5i0iw2sd8wvcq463hqy8-sdf-library/lib/pkgconfig/sdf-library.pc: File format not recognized
patching ELF executables and libraries
patching script interpreter paths