From http://www.rforge.net/Rserve/snapshot/Rserve_1.8-6.tar.gz...
downloading from http://www.rforge.net/Rserve/snapshot/Rserve_1.8-6.tar.gz ...
 Rserve_1.8-6.tar.gz  487KiB                                                                                         792KiB/s 00:01 [##################] 100.0%
sha256 hash mismatch for /gnu/store/bznj81ls02r7kwld6338dhba0pql7nik-Rserve_1.8-6.tar.gz:
  expected hash: 017kkzv9lxlz9qhg3gprrf1wcyflxrif6wjk27x9b4bdzylw6bsx
  actual hash:   0z1xvx8ifvlwfl3rf1wwhpbwp4ivh7sn71xhlqihqpsclpmljg8p
hash mismatch for store item '/gnu/store/bznj81ls02r7kwld6338dhba0pql7nik-Rserve_1.8-6.tar.gz'
build of /gnu/store/378zy9b6c841ciw0y08yvll0z55zpj6q-Rserve_1.8-6.tar.gz.drv failed
View build log at '/var/log/guix/drvs/37/8zy9b6c841ciw0y08yvll0z55zpj6q-Rserve_1.8-6.tar.gz.drv.bz2'.
building /gnu/store/sk5zyi9ix1xhfin8s4qw2q9dspqvxmxb-Rsolnp_1.16.tar.gz.drv...
cannot build derivation `/gnu/store/rxan6diacbbjk1li32havwfahqmwcdyf-r-rserve-1.8-6.drv': 1 dependencies couldn't be built