Hi Marco, Please find more details about the issue:
Host: - Windows_NT Windows 11 (24H2) [Server 2025] amd64 AMD64 Family 23 Model 1 Stepping 2 MS/Windows - setup-x86_64.exe v 2.934 Default command: nothing is installed ``` > setup-x86_64.exe --arch x86_64 --root C:/cygwin64 --symlink-type native > --quiet-mode --no-desktop --packages clang solving: 1 tasks, update: no, use test packages: no solving: 0 tasks, update: no, use test packages: no Augmented Transaction List: is empty ``` Verbose command: 'Conflict.level1' are detected with ANALYZE UNSOLVABLE ``` > setup-x86_64.exe --arch x86_64 --root C:/cygwin64 --symlink-type native > --quiet-mode --no-desktop --verbose --packages clang Added manual package clang solving: 1 tasks, update: no, use test packages: no libsolv: solver started libsolv: dosplitprovides=0, noupdateprovide=0, noinfarchcheck=0 libsolv: allowuninstall=0, allowdowngrade=0, allownamechange=1, allowarchchange=0, allowvendorchange=1 libsolv: dupallowdowngrade=1, dupallownamechange=1, dupallowarchchange=1, dupallowvendorchange=1 libsolv: promoteepoch=0, forbidselfconflicts=0 libsolv: obsoleteusesprovides=0, implicitobsoleteusesprovides=0, obsoleteusescolors=0, implicitobsoleteusescolors=0 libsolv: dontinstallrecommended=0, addalreadyrecommended=0 onlynamespacerecommended=0 libsolv: number of solvables: 828, memory used: 45 K libsolv: number of ids: 1270 + 617 libsolv: string memory used: 4 K array + 14 K data, rel memory used: 7 K array libsolv: string hash memory: 32 K, rel hash memory : 16 K libsolv: provide ids: 622 libsolv: provide space needed: 1554 + 1234 libsolv: shrunk whatprovidesdata from 1554 to 1390 libsolv: shrunk whatprovidesauxdata from 1554 to 929 libsolv: whatprovides memory used: 11 K id array, 10 K data libsolv: whatprovidesaux memory used: 4 K id array, 3 K data libsolv: WARNING: pool_addfileprovides was not called, this may result in slow operation libsolv: lazywhatprovidesq size: 0 entries libsolv: createwhatprovides took 0 ms libsolv: obsoletes data: 1 entries libsolv: added 1689 pkg rules for installed solvables libsolv: added 278 pkg rules for updaters of installed solvables libsolv: added 12 pkg rules for packages involved in a job libsolv: added 0 pkg rules because of weak dependencies libsolv: 483 of 827 installable solvables considered for solving libsolv: pruned rules from 1980 to 1980 libsolv: binary: 320 libsolv: normal: 1659, 3384 literals libsolv: pkg rule memory used: 46 K libsolv: pkg rule creation took 0 ms libsolv: choice rule creation took 0 ms libsolv: 1979 pkg rules, 2 * 221 update rules, 1 job rules, 0 infarch rules, 0 dup rules, 0 choice rules, 0 best rules, 0 yumobs rules libsolv: 0 black rules, 0 recommends rules, 0 repo priority rules libsolv: overall rule memory used: 56 K libsolv: solving... libsolv: ANALYZE UNSOLVABLE ---------------------- libsolv: Rule #1192: libsolv: libsolv: !python39-3.9.16-1.any [521] libsolv: (w1) libsolv: Install.level1 libsolv: libsolv: python39-pip-25.2-2.any [535] libsolv: (w2) libsolv: Conflict.level1 libsolv: libsolv: next rules: 1193 0 libsolv: Rule #1195: libsolv: libsolv: !python3-3.9.16-1.any [519] libsolv: (w1) libsolv: Install.level1 libsolv: libsolv: python39-3.9.16-1.any [521] libsolv: (w2) libsolv: Install.level1 libsolv: libsolv: next rules: 0 0 libsolv: Rule #1159: libsolv: libsolv: !python39-pip-25.2-2.any [535] libsolv: (w1) libsolv: Conflict.level1 libsolv: libsolv: python39-sphinx-4.4.0-1.any [543] libsolv: (w2) libsolv: Conflict.level1 libsolv: libsolv: next rules: 0 0 libsolv: Rule #1858: libsolv: libsolv: !clang-20.1.8-2.any [43] libsolv: (w1) libsolv: Install.level1 libsolv: libsolv: python3-3.9.16-1.any [519] libsolv: (w2) libsolv: Install.level1 libsolv: libsolv: next rules: 0 0 libsolv: Rule #1124: libsolv: libsolv: !python39-sphinx-4.4.0-1.any [543] libsolv: (w1) libsolv: Conflict.level1 libsolv: libsolv: python39-pygments-2.10.0-1.any [538] libsolv: (w2) libsolv: Conflict.level1 libsolv: libsolv: next rules: 1125 1170 libsolv: JOB libsolv: Rule #2422: libsolv: libsolv: clang-20.1.8-2.any [43] libsolv: (w1) libsolv: Install.level1 libsolv: libsolv: next rules: 0 0 libsolv: Rule #1149: libsolv: libsolv: !python39-pygments-2.10.0-1.any [538] libsolv: (w1) libsolv: Conflict.level1 libsolv: libsolv: next rules: 0 0 libsolv: resolving job rules libsolv: resolving installed packages libsolv: deciding orphaned packages libsolv: solver statistics: 0 learned rules, 1 unsolvable, 0 minimization steps libsolv: done solving. libsolv: solver took 16 ms libsolv: final solver statistics: 1 problems, 0 learned rules, 1 unsolvable libsolv: solver_solve took 16 ms ... libsolv: libsolv: ordering transaction libsolv: transaction elements: 0 Augmented Transaction List: is empty ``` Now, if I remove "python39-pip, python39-setuptools" from depends2 in setup.ini file: clang is installed with its dependencies ``` > setup-x86_64.exe --arch x86_64 --root C:/cygwin64 --symlink-type native > --quiet-mode --no-desktop --packages clang solving: 1 tasks, update: no, use test packages: no solving: 3 tasks, update: no, use test packages: no Augmented Transaction List: 0 install python39 3.9.16-1 1 install python3 3.9.16-1 2 install clang 20.1.8-2 ``` Best Regards Ronan -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple

