try passing platform in

Author: IanButterworth

src/Prefix.jl

@@ -716,7 +716,7 @@ function setup_dependencies(prefix::Prefix,
         @show stdlib_pkgspecs
         # Re-install stdlib dependencies, but this time with `julia_version = nothing`
         if !isempty(stdlib_pkgspecs)
-            Pkg_add(stdlib_pkgspecs; io=outs, julia_version=nothing)
+            Pkg_add(stdlib_pkgspecs; io=outs, platform=platform, julia_version=nothing)
         end
 
         # Load their Artifacts.toml files