backwards compatibility fix for pdm <2.26.2

[sigma67]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 94.53%. Comparing base (e420cae) to head (5b45bb3).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pdm_build_locked/command.py	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
- Coverage   95.27%   94.53%   -0.75%     
==========================================
  Files           3        3              
  Lines         127      128       +1     
  Branches       20       21       +1     
==========================================
  Hits          121      121              
  Misses          4        4              
- Partials        2        3       +1     

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