stripping (with flags -S) in  /nix/store/pw70q50p0bs0fsyippr7m7685dd49hsc-sdf-library/lib 
strip: /nix/store/pw70q50p0bs0fsyippr7m7685dd49hsc-sdf-library/lib/pkgconfig/sdf-library.pc: File format not recognized
patching ELF executables and libraries
patching script interpreter paths