I downloaded the latest nightly build (freecol-nightly-20220420.zip).

It contained the script freecol in the directory freecol.

This script had two issues:

• The file lacked the executable permission. This could be fixed with chmod +x freecol/freecol.
• The file contained CRLF line endings (dos/windows style).
  • Thus it was not executable: bash: freecol/freecol: /bin/sh^M: bad interpreter: No such file or directory
  • the ^M marks the carriage return (\r) which is not supposed to be there and which is interpreted as being part of the filename
  • this could be fixed with: fromdos freecol/freecol

The original script in the repository looks good: packaging/common/freecol.sh (executable flag and correct line ending).

Thus I guess, that build.xml needs some adjustments.

Thank you for your time!