Precompilation failure (InitError: failed process)

When precompiling [Anneal.jl](https://github.com/psrenergy/Anneal.jl/tree/docs) (docs branch) there seems to be some process lock problem with libmamba.

The complete shell session is here: (.CondaPkg is created but left empty)
```julia
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PS D:\gits\Anneal.jl> julia --project
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.7.0 (2021-11-30)
_/ |\__'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |

(Anneal) pkg> precompile
Precompiling project...
✗ Anneal
0 dependencies successfully precompiled in 19 seconds (32 already precompiled)

ERROR: The following 1 direct dependency failed to precompile:

Anneal [e4d9eb7f-b088-426e-aeb5-1c0dae3d8abb]

Failed to precompile Anneal [e4d9eb7f-b088-426e-aeb5-1c0dae3d8abb] to C:\Users\pedroxavier\.julia\compiled\v1.7\Anneal\jl_E2.tmp.
CondaPkg Found dependencies: D:\gits\Anneal.jl\CondaPkg.toml
CondaPkg Found dependencies: C:\Users\pedroxavier\.julia\packages\PythonCall\4eoCM\CondaPkg.toml
CondaPkg Resolving changes
+ dwave-neal (pip)
+ pip
+ python
CondaPkg Installing packages
warning libmamba Cannot lock 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
Waiting for other mamba process to finish
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
warning libmamba LockFile creation for path 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache' failed, continuing without it
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
warning libmamba LockFile creation for path 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache' failed, continuing without it
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
warning libmamba LockFile creation for path 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache' failed, continuing without it
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
ERROR: LoadError: InitError: failed process: Process(`'C:\Users\pedroxavier\.julia\artifacts\d628738c351341856bc6e8abe94cd6c8d8a7bf66\Library\bin\micromamba.exe' -r 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root' create -q -y -p 'D:\gits\Anneal.jl\.CondaPkg\env' --override-channels --no-channel-priority pip "python[version='>=3.7,<4']" -c anaconda -c conda-forge`, ProcessExited(3221226505)) [3221226505]

Stacktrace:
[1] pipeline_error
@ .\process.jl:531 [inlined]
[2] run(::Cmd; wait::Bool)
@ Base .\process.jl:446
[3] run(::Cmd)
@ Base .\process.jl:444
[4] _run(io::IO, cmd::Cmd, args::Any; flags::Any)
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:283
[5] _resolve_conda_install(io::Any, conda_env::Any, specs::Any, channels::Any; create::Any)
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:191
[6] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:395
[7] resolve()
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:288
[8] envdir()
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\env.jl:70
[9] init_context()
@ PythonCall.C C:\Users\pedroxavier\.julia\packages\PythonCall\4eoCM\src\cpython\context.jl:56
[10] __init__()
@ PythonCall.C C:\Users\pedroxavier\.julia\packages\PythonCall\4eoCM\src\cpython\CPython.jl:21
[11] _include_from_serialized(path::String, depmods::Vector{Any})
@ Base .\loading.jl:768
[12] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String)
@ Base .\loading.jl:854
[13] _require(pkg::Base.PkgId)
@ Base .\loading.jl:1097
[14] require(uuidkey::Base.PkgId)
@ Base .\loading.jl:1013
[15] require(into::Module, mod::Symbol)
@ Base .\loading.jl:997
[16] include(mod::Module, _path::String)
@ Base .\Base.jl:418
[17] include(x::String)
@ Anneal D:\gits\Anneal.jl\src\Anneal.jl:1
[18] top-level scope
@ D:\gits\Anneal.jl\src\Anneal.jl:40
[19] include
@ .\Base.jl:418 [inlined]
[20] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::Nothing)
@ Base .\loading.jl:1318
[21] top-level scope
@ none:1
[22] eval
@ .\boot.jl:373 [inlined]
[23] eval(x::Expr)
@ Base.MainInclude .\client.jl:453
[24] top-level scope
@ none:1
during initialization of module C
in expression starting at D:\gits\Anneal.jl\src\annealers\simulated\simulated.jl:1
in expression starting at D:\gits\Anneal.jl\src\Anneal.jl:1

julia> versioninfo()
Julia Version 1.7.0
Commit 3bf9d17731 (2021-11-30 12:12 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-12.0.1 (ORCJIT, skylake)

julia> using Pkg; Pkg.status()
Project Anneal v0.1.0
Status `D:\gits\Anneal.jl\Project.toml`
[992eb4ea] CondaPkg v0.2.10
[b8f27783] MathOptInterface v1.2.0
[6099a3de] PythonCall v0.9.0
[9a3f8284] Random

julia> using CondaPkg; CondaPkg.status()
CondaPkg Status D:\gits\Anneal.jl\CondaPkg.toml
Not Resolved (resolve first for more information)
Packages
python (>=3.7,<4)
Channels
anaconda
conda-forge
Pip packages
dwave-neal (>=0.5.6)

julia> CondaPkg.re
read_deps read_meta resolve
julia> CondaPkg.resolve()
CondaPkg Found dependencies: D:\gits\Anneal.jl\CondaPkg.toml
CondaPkg Found dependencies: C:\Users\pedroxavier\.julia\packages\PythonCall\4eoCM\CondaPkg.toml
CondaPkg Resolving changes
+ dwave-neal (pip)
+ pip
+ python
CondaPkg Installing packages
warning libmamba Cannot lock 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
Waiting for other mamba process to finish
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
warning libmamba LockFile creation for path 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache' failed, continuing without it
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
warning libmamba LockFile creation for path 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache' failed, continuing without it
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
warning libmamba LockFile creation for path 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache' failed, continuing without it
error libmamba Path already locked by the same PID: 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root\pkgs\cache'
ERROR: failed process: Process(`'C:\Users\pedroxavier\.julia\artifacts\d628738c351341856bc6e8abe94cd6c8d8a7bf66\Library\bin\micromamba.exe' -r 'C:\Users\pedroxavier\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root' create -q -y -p 'D:\gits\Anneal.jl\.CondaPkg\env' --override-channels --no-channel-priority pip "python[version='>=3.7,<4']" -c anaconda -c conda-forge`, ProcessExited(3221226505)) [3221226505]

Stacktrace:
[1] pipeline_error
@ .\process.jl:531 [inlined]
[2] run(::Cmd; wait::Bool)
@ Base .\process.jl:446
[3] run(::Cmd)
@ Base .\process.jl:444
[4] _run(io::IO, cmd::Cmd, args::Any; flags::Any)
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:283
[5] _resolve_conda_install(io::Any, conda_env::Any, specs::Any, channels::Any; create::Any)
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:191
[6] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:395
[7] resolve()
@ CondaPkg C:\Users\pedroxavier\.julia\packages\CondaPkg\Olo5Y\src\resolve.jl:288
[8] top-level scope
@ REPL[5]:1

julia>
```

PS: I have some experience with the Python C API . If you could provide some insights about your thought process on this topic, so I can learn more about the package, I'd be happy to make pull requests for PythonCall in the future!