When using some package that depends on MbedTLS, for example HTTP.jl, compilation will fail and the package remains unusable.

It seems that it gets the cert store path from the Julia-bundled MozillaCACerts_jll lib, which has a hardcoded path.
This file needs to be patched with the correct location in Arch:

/usr/share/julia/stdlib/v1.8/MozillaCACerts_jll/src/MozillaCACerts_jll.jl

Related: https://archlinux.org/todo/use-system-ca-store/

Steps to reproduce:

$ julia
>]add HTTP
>]precompile

See also:
- https://discourse.julialang.org/t/problems-installing-packages-cert-pm-no-such-file/83995/4
- https://github.com/JuliaLang/MbedTLS.jl/pull/238#issuecomment-1179609433
- https://github.com/JuliaLang/MbedTLS.jl/pull/246

The Julia community repeatedly calls out Arch's package as malfunctioning and completely broken, but this wouldn't be a problem if they stopped bundling everything under the sun…

Complete error:

Failed to precompile HTTP [cd3eb016-35fb-5094-929b-558a96fad6f3] to ~/.julia/compiled/v1.8/HTTP/jl_OEog6v.
ERROR: LoadError: InitError: SystemError: opening file "/usr/share/julia/cert.pem": No such file or directory
Stacktrace:
[1] open
@ ./io.jl:381 [inlined]
[2] read
@ ./io.jl:462 [inlined]
[3] __sslinit__()
@ MbedTLS ~/.julia/packages/MbedTLS/lqmet/src/ssl.jl:787
[4] __init__()
@ MbedTLS ~/.julia/packages/MbedTLS/lqmet/src/MbedTLS.jl:55
[5] top-level scope
@ stdin:1
during initialization of module MbedTLS