Austin Ok with the new msys2 I get the too-many-symbols thing below. This didn't happen before. Maybe I can switch off dynamic linking? How? Simon Too many symbols in DLL compiler/stage2/build/libHSghc-7.7.20131107-0-ghc7.7.20131107.dll [5263] ghczm7zi7zi20131107_Var_zdfUniquableVar_closure [5264] ghczm7zi7zi20131107_Var_zdfUniquableVar_info [5265] ghczm7zi7zi20131107_Var_zdwsetVarUnique_closure [5266] ghczm7zi7zi20131107_Var_zdwsetVarUnique_info [5267] ghczm7zi7zi20131107_Var_zdwupdateTyVarKindM_closure [5268] ghczm7zi7zi20131107_Var_zdwupdateTyVarKindM_info [5269] ghczm7zi7zi20131107_Var_zdwzdcgmapMp_closure [5270] ghczm7zi7zi20131107_Var_zdwzdcgmapMp_info [5271] setHeapSize compiler/ghc.mk:472: recipe for target 'compiler/stage2/build/libHSghc-7.7.20131107-0-ghc7.7.20131107.dll' failed make[1]: *** [compiler/stage2/build/libHSghc-7.7.20131107-0-ghc7.7.20131107.dll] Error 1 make[1]: *** Deleting file 'compiler/stage2/build/libHSghc-7.7.20131107-0-ghc7.7.20131107.dll' Makefile:64: recipe for target 'all' failed make: *** [all] Error 2 HEAD $