load correctly

Author: ChrisRackauckas

ext/DiffEqBaseReverseDiffExt.jl

@@ -2,7 +2,7 @@ module DiffEqBaseReverseDiffExt
 
 using DiffEqBase
 import DiffEqBase: value
-import ReverseDiff
+isdefined(Base, :get_extension) ? (import ReverseDiff) : (import ..ReverseDiff)
 
 DiffEqBase.value(x::ReverseDiff.TrackedReal) = x.value
 DiffEqBase.value(x::ReverseDiff.TrackedArray) = x.value

ext/DiffEqBaseTrackerExt.jl

@@ -2,7 +2,7 @@ module DiffEqBaseTrackerExt
 
 using DiffEqBase
 import DiffEqBase: value
-import Tracker
+isdefined(Base, :get_extension) ? (import Tracker) : (import ..Tracker)
 
 DiffEqBase.value(x::Type{Tracker.TrackedReal{T}}) where {T} = T
 DiffEqBase.value(x::Type{Tracker.TrackedArray{T, N, A}}) where {T, N, A} = Array{T, N}

ext/DiffEqBaseZygoteExt.jl

@@ -2,7 +2,7 @@ module DiffEqBaseZygoteExt
 
 using DiffEqBase
 import DiffEqBase: value
-import Zygote
+isdefined(Base, :get_extension) ? (import Zygote) : (import ..Zygote)
 
 function ∇tmap(cx, f, args...)
     ys_and_backs = SciMLBase.tmap((args...) -> Zygote._pullback(cx, f, args...), args...)