Hi Tamar, Recently I've been working on (finally) stabilizing our remaining CI configurations (namely i386/Linux and Windows). I've opened a number of tickets (see the list in !487 [1]) but one of these in particular I'd like your input on. Specifically #16387: The problem is the apparent multiple-definition of __mingw_vsnwprintf: once in mingwex.a and again in RtsSymbols. Unfortunately I have been unable to reproduce this error locally, so debugging has been a bit tricky. The RtsSymbols entry was introduced in 4de585a5c1ac3edc2914cebcac1753b514051a89 (which lifted the MAX_PATH restriction in the RTS) but there was no explanation for why. Do you happen to recall why you added it? Note [Symbols for MinGW's printf] seems relevant, but seems to only discuss the entries for _lock_file and _unlock_file. Cheers, - Ben [1] https://gitlab.haskell.org/ghc/ghc/merge_requests/487