Could `@everywhere` support using macros from packages that are loaded in the same block?

Consider the following (with TimeZones.jl installed in global enviroment),

using Distributed
addprocs(1)
@everywhere begin
    using TimeZones
    foo() = tz"America/New_York"
end

This should be valid as far as I know.

This failed in julia 1.6, but i think i first noticed this many many versiions ago

julia> using Distributed

julia> addprocs(1)
1-element Vector{Int64}:
 2

julia> @everywhere begin
           using TimeZones
           foo() = tz"America/New_York"
       end
ERROR: On worker 2:
LoadError: UndefVarError: @tz_str not defined
Stacktrace:
 [1] top-level scope
   @ :0
 [2] eval
   @ ./boot.jl:360
 [3] JuliaLang/julia#103
   @ /usr/local/src/julia/julia-1.6/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:274
 [4] run_work_thunk
   @ /usr/local/src/julia/julia-1.6/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:63
 [5] run_work_thunk
   @ /usr/local/src/julia/julia-1.6/usr/share/julia/stdlib/v1.6/Distributed/src/process_messages.jl:72
 [6] JuliaLang/julia#96
   @ ./task.jl:411
in expression starting at REPL[3]:3
Stacktrace:
 [1] sync_end(c::Channel{Any})
   @ Base ./task.jl:369
 [2] macro expansion
   @ ./task.jl:388 [inlined]
 [3] remotecall_eval(m::Module, procs::Vector{Int64}, ex::Expr)
   @ Distributed /usr/local/src/julia/julia-1.6/usr/share/julia/stdlib/v1.6/Distributed/src/macros.jl:223
 [4] top-level scope
   @ /usr/local/src/julia/julia-1.6/usr/share/julia/stdlib/v1.6/Distributed/src/macros.jl:207

In contrast

@everywhere using TimeZones
@everywhere foo() = tz"America/New_York"

works just fine.

Similar failure occurs with normal macros, e.g.

@everywhere begin
       using JuMP
       @variable(Model(), x)
end

Start with Distributed/src/macros.jl, especially the @everywhere and remotecall_eval entry points shown in the stack trace, and reproduce the TimeZones and JuMP examples. Done means a package loaded earlier in the same @everywhere block makes its macros available to later expressions on workers, with tests covering both examples.