# Recommended transition to LazyArtifacts
**URL:** https://discourse.julialang.org/t/recommended-transition-to-lazyartifacts/50870
**Category:** Internals & Design
**Created:** [November 27, 2020, 4:33pm UTC](https://discourse.julialang.org/t/recommended-transition-to-lazyartifacts/50870 "2020-11-27T16:33:44Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@dmbates](https://discourse.julialang.org/u/dmbates)
#### Post date: [November 27, 2020, 4:33pm UTC](https://discourse.julialang.org/t/recommended-transition-to-lazyartifacts/50870/1 "2020-11-27T16:33:45Z")
Is there a recommended path for packages that use Artifacts to transition from
```julia
using Pkg.Artifacts
```
to
```julia
using LazyArtifacts
```
I’m a bit confused about how to modify Project.toml so that it works with both the 1.5 and 1.6 versions of Julia
---
### Author:  [@staticfloat](https://discourse.julialang.org/u/staticfloat)
#### Post date: [November 27, 2020, 8:24pm UTC](https://discourse.julialang.org/t/recommended-transition-to-lazyartifacts/50870/2 "2020-11-27T20:24:26Z")
If you need backwards compatibility with v1.5, then importing just `Pkg` will work.
---
### Author:  [@dmbates](https://discourse.julialang.org/u/dmbates)
#### Post date: [November 28, 2020, 4:08pm UTC](https://discourse.julialang.org/t/recommended-transition-to-lazyartifacts/50870/3 "2020-11-28T16:08:49Z")
Under 1.6.0-DEV.1588 I get an error
```julia
julia> using MixedModels
[Info: Precompiling MixedModels [ff71e718-51f3-5ec2-a782-8ffcbfa3c316]
ERROR: InitError: Artifact "TestData" is a lazy artifact; package developers must call `using LazyArtifacts` in MixedModels before using lazy artifacts.
Stacktrace:
[1] error(s::String)
@ Base ./error.jl:33
[2] _artifact_str( __module__ ::Module, artifacts_toml::String, name::SubString{String}, path_tail::String, artifact_dict::Dict{String, Any}, hash::Base.SHA1, platform::Base.BinaryPlatforms.Platform, lazyartifacts::Any)
@ Artifacts ~/git/julia/usr/share/julia/stdlib/v1.6/Artifacts/src/Artifacts.jl:548
[3] #invokelatest#2
@ ./essentials.jl:707 [inlined]
[4] invokelatest
@ ./essentials.jl:706 [inlined]
[5] macro expansion
@ ~/git/julia/usr/share/julia/stdlib/v1.6/Artifacts/src/Artifacts.jl:675 [inlined]
[6] __init__ ()
@ MixedModels ~/.julia/dev/MixedModels/src/MixedModels.jl:143
[7] _include_from_serialized(path::String, depmods::Vector{Any})
@ Base ./loading.jl:669
[8] _require_from_serialized(path::String)
@ Base ./loading.jl:722
[9] _require(pkg::Base.PkgId)
@ Base ./loading.jl:1026
[10] require(uuidkey::Base.PkgId)
@ Base ./loading.jl:909
[11] require(into::Module, mod::Symbol)
@ Base ./loading.jl:896
during initialization of module MixedModels
```
---
### Author:  [@staticfloat](https://discourse.julialang.org/u/staticfloat)
#### Post date: [December 2, 2020, 3:55am UTC](https://discourse.julialang.org/t/recommended-transition-to-lazyartifacts/50870/4 "2020-12-02T03:55:16Z")
Does `MixedModels` import `Pkg`?