Hello, it seems that the FreeCAD package hash is incorrect as when I try to build the package I get the following error: --8<---------------cut here---------------start------------->8--- building /gnu/store/xfaipns1rr4l4zmkc5p4q0ikd0r6srz6-freecad-0.20.2-checkout.drv... \r:sha256 hash mismatch for /gnu/store/3lf0plqrf3rwcvd2vlkwaxcc997mivl0-freecad-0.20.2-checkout: expected hash: 02976k91ypv41rqdl27jbmyhnhgx7k5bj520lcqs8qzgcdsynd03 actual hash: 0wsfz2jqfhmqshyr1n4qxcc3c6a96gyll4h34vn2zzvvcnncn9rb hash mismatch for store item '/gnu/store/3lf0plqrf3rwcvd2vlkwaxcc997mivl0-freecad-0.20.2-checkout' build of /gnu/store/xfaipns1rr4l4zmkc5p4q0ikd0r6srz6-freecad-0.20.2-checkout.drv failed View build log at '/var/log/guix/drvs/xf/aipns1rr4l4zmkc5p4q0ikd0r6srz6-freecad-0.20.2-checkout.drv.gz'. cannot build derivation `/gnu/store/nv4ij1q5106bjv6mpsr2bincifbvynad-freecad-0.20.2.drv': 1 dependencies couldn't be built guix upgrade: error: build of `/gnu/store/nv4ij1q5106bjv6mpsr2bincifbvynad-freecad-0.20.2.drv' failed --8<---------------cut here---------------end--------------->8--- Here's a patch that fixes the hash.