Hi guys. I'm trying something I believe is trivial, on centOS 9 with mock version 2.16 -> $ mock -r centos-stream-8-x86_64 --rootdir=~/mock --localrepo=/00.STORAGE/1/var/www/repos --continue --chain ./mpfr-4.1.0-7.el9.src.rpm ./libmpc-1.2.1-4.el9.src.rpm ... CentOS Stream 8 - PowerTools 14 kB/s | 4.4 kB 00:00 Error: Problem: cannot install the best update candidate for package libmpc-1.1.0-9.1.el8.x86_64 - problem with installed package libmpc-1.1.0-9.1.el8.x86_64 - package libmpc-1.1.0-9.1.el8.x86_64 requires libmpfr.so.4()(64bit), but none of the providers can be installed - cannot install the best update candidate for package mpfr-3.1.6-1.el8.x86_64 - cannot install both mpfr-4.1.0-7.el8.x86_64 and mpfr-3.1.6-1.el8.x86_64 - cannot install both mpfr-3.1.6-1.el8.x86_64 and mpfr-4.1.0-7.el8.x86_64 (try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages) ERROR: Exception(./libmpc-1.2.1-4.el9.src.rpm) Config(centos-stream-8-x86_64) 0 minutes 6 seconds INFO: Results and/or logs in: /00.STORAGE/1/var/www/repos/results/centos-stream-8-x86_64/libmpc-1.2.1-4.el9 ERROR: Command failed: ... Why would it end up asking for 'mpfr-3.1.6' if 'libmpc-1.2.1' requires ver. >4.x and.. why would 'ibmpc-1.1.0-9.1' even show up there I cannot wrap my head around it. I've only started using 'mock' but this weird stuff have not seen until now. many thanks, L.