Hi, It appears that the code we have to generate CPIO archives doesn't handle the presence of non-ASCII characters in the file names of files to be archived well:
First, to make rpm usable on a Guix System: --8<---------------cut here---------------start------------->8--- # mkdir /var/lib/rpm # chown root:users /var/lib/rpm # chmod g+rw /var/lib/rpm --8<---------------cut here---------------end--------------->8--- Then, produce a problematic CPIO via 'guix pack -f rpm', which uses (guix cpio): --8<---------------cut here---------------start------------->8--- $ rpm_archive=$(guix pack -R -C none -f rpm nss-certs) --8<---------------cut here---------------end--------------->8--- Notice that it cannot be installed: --8<---------------cut here---------------start------------->8--- $ mkdir /tmp/nss-certs # rpm --prefix=/tmp/nss-certs -i $rpm_archive error: unpacking of archive failed: cpio: Bad magic error: nss-certs-3.81-0.x86_64: install failed --8<---------------cut here---------------end--------------->8--- Let's now inspect the cpio itself. --8<---------------cut here---------------start------------->8--- $ guix shell rpm cpio [env]$ rpm2cpio $rpm_archive > nss-certs.cpio [env]$ cpio -t < nss-certs.cpio |& grep -B3 junk ./gnu/store/1klwvqm3njp070h982ydcix1gzf2zmdl-nss-certs-3.81/etc/ssl/certs/9482e63a.0 ./gnu/store/1klwvqm3njp070h982ydcix1gzf2zmdl-nss-certs-3.81/etc/ssl/certs/9846683b.0 ./gnu/store/1klwvqm3njp070h982ydcix1gzf2zmdl-nss-certs-3.81/etc/ssl/certs/988a38cb.0 cpio: warning: skipped 248 bytes of junk -- ./gnu/store/1klwvqm3njp070h982ydcix1gzf2zmdl-nss-certs-3.81/etc/ssl/certs/Microsoft_RSA_Root_Certificate_Authority_2017.pem ./gnu/store/1klwvqm3njp070h982ydcix1gzf2zmdl-nss-certs-3.81/etc/ssl/certs/NAVER_Global_Root_Certification_Authority.pem ./gnu/store/1klwvqm3njp070h982ydcix1gzf2zmdl-nss-certs-3.81/etc/ssl/certs/NetLock_Arany_=Class_Gold=_Főtanúsítvány. cpio: warning: skipped 4 bytes of junk --8<---------------cut here---------------end--------------->8--- I haven't yet pin-pointed what the problem is. I could do with extra eyes :-). -- Thanks, Maxim