I have been having a hard time getting guixsd installed on my x200 the past few days. I am running the command "guix system init /mnt/etc/config.scm /mnt --substitute-urls="https://berlin.guixsd.org"" and everything seems to be working but after a couple hours into the install I keep getting this message

sha256 hash mismatch for output path '/gnu/store/bjpalrv9f49d2k40p7ga0y6dwdys9w5j-bzip2-1.0.6.tar.gz'

expected: *****************************************

actual: *********************************************

cannot build derivation: ***************************

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is there something in the guix system init command that I am leaving out?