stripping (with flags -S) in  /nix/store/wrpfg585c9c6sm287i1w0bw93dmd7a82-sdf-library/lib 
strip: /nix/store/wrpfg585c9c6sm287i1w0bw93dmd7a82-sdf-library/lib/pkgconfig/sdf-library.pc: File format not recognized
patching ELF executables and libraries
patching script interpreter paths