opam var arch is "x64_64"

[Armael]

opam var arch returns x64_64, which doesn't seem right, and prevents me from installing ocaml-freestanding (which requires me to have "arch=x86_64 | arch=amd64"). Interestingly, the architecture printed by opam config report is correct...

$ opam config report
# opam config report
# opam-version      2.0.1 
# self-upgrade      no
# system            arch=x86_64 os=linux os-distribution=arch os-version=unknown
# solver            builtin-mccs+glpk
# install-criteria  -removed,-count[version-lag,request],-count[version-lag,changed],-changed
# upgrade-criteria  -removed,-count[version-lag,solution],-new
# jobs              4
# repositories      4 (http) (default repo at 50da06f4)
# pinned            0
# current-switch    mirage

$ uname -a
Linux wok 4.19.12-arch1-1-ARCH #1 SMP PREEMPT Fri Dec 21 13:56:54 UTC 2018 x86_64 GNU/Linux

$ opam var arch
x64_64

[Armael]

Workarounds I tried:

$ opam config set arch x86_64

This seemed to do something (running the command a second time told me nothing changed, from which I deduce it did something the first time) -- but didn't change the result of opam var arch...

OPAMVAR_arch=x86_64 opam install ocaml-freestanding

That worked.

[Armael]

My bad! For some unknown reason, I had export OPAMVAR_arch=x64_64 in my .profile...

[avsm]

That's quite a funnily specific variable to have you in your .profile? ;-) Any particular reason you needed it in the first place?

[Armael]

No idea... It's probably been there for a long time, and I can't remember adding it...