This does fix the issue in #1033 but there is one potential
I can understand if this is not of high priority for now but it's worth
mentioning for future
`profile.x86_64` is installed as `/usr/share/defaults/etc/profile` and
that is sourced by
`~/.bashrc`, which in turn is sourced by `~/.profile`, so this file
would be sourced strict
POSIX compatible shells that doesn't support Bash features.
Notably, (1) `[[` is not supported in POSIX and (2) supported parameter
Suppose a user built `dash` and other strict POSIX shells, and made it a
upon sourcing `/usr/share/defaults/etc/profile`, error would occur and
variable won't be set up correctly.