stripping (with flags -S) in  /nix/store/fi8rbw8l7mmk7y3vcf6mzx4mgfjfd2l2-aster/bin 
patching ELF executables and libraries
/nix/store/fi8rbw8l7mmk7y3vcf6mzx4mgfjfd2l2-aster/bin/aster
patching script interpreter paths