fix pkg-config generation on windows

[cpunion]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 5.33333% with 71 lines in your changes missing coverage. Please review.

Project coverage is 54.41%. Comparing base (d3c2025) to head (facd8d9).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/internal/rungo/run.go	0.00%	26 Missing ⚠️
cmd/internal/install/python.go	0.00%	25 Missing ⚠️
cmd/exec.go	0.00%	11 Missing ⚠️
internal/env/env.go	57.14%	3 Missing ⚠️
cmd/build.go	0.00%	1 Missing ⚠️
cmd/install.go	0.00%	1 Missing ⚠️
cmd/internal/create/templates/main.go	0.00%	1 Missing ⚠️
cmd/run.go	0.00%	1 Missing ⚠️
inject.go	0.00%	1 Missing ⚠️
internal/env/pyenv.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
- Coverage   54.54%   54.41%   -0.13%     
==========================================
  Files          40       41       +1     
  Lines        2737     2749      +12     
==========================================
+ Hits         1493     1496       +3     
- Misses       1184     1193       +9     
  Partials       60       60              

Flag	Coverage Δ
unittests	54.41% <5.33%> (-0.13%)	⬇️

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