Add CARGO_MAKE_WORKING_DIRECTORY.

[daxpedda]

Fixes #310.

[codecov-io]

Codecov Report

Merging #311 into 0.24.0 will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           0.24.0     #311      +/-   ##
==========================================
+ Coverage   93.11%   93.11%   +<.01%     
==========================================
  Files          86       86              
  Lines       14890    14894       +4     
==========================================
+ Hits        13865    13869       +4     
  Misses       1025     1025

Impacted Files	Coverage Δ
src/lib/environment/mod.rs	96.05% <100%> (+0.05%)	⬆️

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[daxpedda]

Do you want me to move this PR to the 0.24.0 branch?

[sagiegurari]

thanks for the PR. this looks great.
i already switched the base branch.
will probably merge both your PRs today/tomorrow.

[sagiegurari]

merged. thanks a lot!!