I followed the instructions on the wiki to enable debug symbols in my build of GHC. (https://gitlab.haskell.org/ghc/ghc/-/wikis/building/hadrian#enabling-dwarf-d...) So I added these flags to may hadrian.settings file stage1.*.ghc.hs.opts += -g3 stage1.*.cabal.configure.opts += --disable-library-stripping --disable-executable-stripping stage1.ghc-bin.ghc.link.opts += -eventlog The resulting executable has debug information in it for the executable component but not for any of the libraries in including the compiler library. ("../sysdeps/x86_64/start.S",Just 4414944,Just 4414987,139633489318136) ("init.c",Nothing,Nothing,139633489318136) ("../sysdeps/x86_64/crti.S",Nothing,Nothing,139633489318136) ("ghc/Main.hs",Just 4415312,Just 4615455,139633489318136) ("ghc/GHCi/Leak.hs",Just 4615480,Just 4623414,139633489318136) ("ghc/GHCi/UI.hs",Just 4623440,Just 5461990,139633489318136) ("ghc/GHCi/UI/Info.hs",Just 5461992,Just 5571230,139633489318136) ("ghc/GHCi/UI/Monad.hs",Just 5571232,Just 5679695,139633489318136) ("ghc/GHCi/UI/Tags.hs",Just 5679696,Just 5704775,139633489318136) ("ghc/GHCi/Util.hs",Just 24,Just 173,139633489318136) ("../sysdeps/x86_64/crtn.S",Nothing,Nothing,139633489318136) I tried building a project with cabal and the resulting executable had debug information for every file in the dependencies as well as the main project. So how do I convince hadrian to include the correct information? Is it a bug in hadrian? I checked the command line when building the library and `-g3` is passed. Cheers, Matt