Fixes <https://issues.guix.gnu.org/66659>.
Fixes a regression introduced in 6b0a321969. The
first attempt in e098ba2f49 to fix this issue didn't work.
* gnu/home/services.scm (compute-on-first-login-script): Add
‘begin *unspecified*’ around #$@gexps.
Change-Id: I14339ad684ffe93e692e507b57dcd221d96210ef
Signed-off-by: Clément Lassieur <clement@lassieur.org>