I created a Vagrant virtual machine using their "ubuntu/trusty64" box (
https://atlas.hashicorp.com/ubuntu/boxes/trusty64).
I connected to it via "vagrant ssh"; that gave me a shell prompt. I can't remember whether that gave me a root prompt or not; if it didn't, then I'd have typed "sudo -s".
I ran "aptitude" and installed some packages in order to build guix from source: g++ guile-2.0-dev libbz2-dev libgcrypt11-dev libsqlite3-dev sqlite3
I unpacked the 0.8.3 source tarball into /usr/local/src.
I typed "./configure", then "make", then "make check".
I saw
============================================================================
Testsuite summary for GNU Guix 0.8.3
============================================================================
# TOTAL: 44
# PASS: 41
# SKIP: 0
# XFAIL: 0
# FAIL: 3
# XPASS: 0
# ERROR: 0
============================================================================
See ./test-suite.log
Please report to
address@hiddenSo ... here I am, reporting it!