this isn't exactly a GHC issue but perhaps someone knows how to get it resolved? (suspecting commercial/stack i've raised [this issue]( https://github.com/commercialhaskell/stack/issues/5732) there). tl;dr `stack exec -- pacman -S ...` like commands required for building GHC on windows are broken and have been for sometime ghc-lib CI runs this command on windows, ``` stack --resolver lts-18.23 exec -- pacman -S autoconf automake-wrapper make patch python tar mintty --noconfirm ``` this normally works ok but as of today, ``` warning: database file for 'clang32' does not exist (use '-Sy' to download) warning: mintty-1~3.6.0-1 is up to date -- reinstalling error: failed to prepare transaction (could not find database) ``` in another project (ghc-lib-parser-ex), a similar command (different compiler version/stack yaml) has been producing the following reliably long enough that i'm sorry to say i just gave up testing it windows. ``` :: File /var/cache/pacman/pkg/automake1.9-1.9.6-3-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] error: automake1.10: signature from "David Macek " is unknown trust error: automake1.11: signature from "David Macek " is unknown trust error: automake1.12: signature from "David Macek " is unknown trust error: automake1.13: signature from "David Macek " is unknown trust error: automake1.14: signature from "David Macek " is unknown trust error: automake1.15: signature from "David Macek " is unknown trust :: File /var/cache/pacman/pkg/automake1.10-1.10.3-4-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] :: File /var/cache/pacman/pkg/automake1.11-1.11.6-4-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] :: File /var/cache/pacman/pkg/automake1.12-1.12.6-4-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] :: File /var/cache/pacman/pkg/automake1.13-1.13.4-5-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] :: File /var/cache/pacman/pkg/automake1.14-1.14.1-4-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] error: automake1.16: signature from "David Macek " is unknown trust error: failed to commit transaction (invalid or corrupted package) :: File /var/cache/pacman/pkg/automake1.15-1.15.1-2-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] :: File /var/cache/pacman/pkg/automake1.16-1.16.3-1-any.pkg.tar.zst is corrupted (invalid or corrupted package (PGP signature)). Do you want to delete it? [Y/n] Errors occurred, no packages were upgraded. ``` -- Shayne Fletcher