Absolute paths in files created by GbuildToJson in Cygwin environment are Windows paths (like "C:/....'), while relative paths in the Python program executed in Cygwin are treated as Unix paths ('/cygdrive/c/....') which caused wrong relative paths to be generated by the call to 'os.relpath'. It would walk up to the root of the Windows path and then walk down the tree in the Unix file system path again. This converts the paths to absolute Windows paths first to avoid this issue. Change-Id: I2e3e6926e312d64aa18067933a5903ac7ad5d31a Reviewed-on: https://gerrit.libreoffice.org/75114 Tested-by: Jenkins Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>