Hello, Using Guix from both the ‘master’ branch¹ and from the ‘core-updates-frozen’ branch², the following command fails: --8<---------------cut here---------------start------------->8--- $ guix build --check \ -e '(@@ (gnu packages commencement) gcc-core-mesboot1)’ ⋮ guix build: erro: derivation `/gnu/store/qbnxfv7v7288iisl44kccz68k0pv9qdi-gcc-core-mesboot1-4.6.4.drv' may not be deterministic: output `/gnu/store/rn3qvn67nraicabvlrx1rhw6nsjrpgpx-gcc-core-mesboot1-4.6.4' differs --8<---------------cut here---------------end--------------->8--- During the stripping phase, there are many of these warnings, which may be related: --8<---------------cut here---------------start------------->8--- starting phase `strip' stripping binaries in "/gnu/store/rn3qvn67nraicabvlrx1rhw6nsjrpgpx-gcc-core-mesboot1-4.6.4/lib" with "strip" and flags ("--strip-debug" "--enable-deterministic-archives") strip: unrecognized option `--enable-deterministic-archives' Usage: strip in-file(s) Removes symbols and sections from files The options are: -I --input-target= Assume input file is in format -O --output-target= Create an output file in format -F --target= Set both input and output format to -p --preserve-dates Copy modified/access timestamps to the output -R --remove-section= Remove section from the output -s --strip-all Remove all symbol and relocation information -g -S -d --strip-debug Remove all debugging symbols --strip-unneeded Remove all symbols not needed by relocations -N --strip-symbol= Do not copy symbol -K --keep-symbol= Only copy symbol -x --discard-all Remove all non-global symbols -X --discard-locals Remove any compiler-generated symbols -v --verbose List all object files modified -V --version Display this program's version number -h --help Display this output --info List object formats & architectures supported -o Place stripped output into strip: supported targets: elf32-i386 a.out-i386-linux efi-app-ia32 elf32-little elf32-big srec symbolsrec tekhex binary ihex trad-core --8<---------------cut here---------------end--------------->8--- -- Thanks, Thiago ¹ commit eb0abba3877c0caeac24d0f9c71f31420dba8d6b ² commit a3fc64e4f159b601c18d091713f9c76c01b010aa