Hi all, I'm trying to get GHC to build the libraries with cabal, but without breaking the hugs build. For base I have a Setup.hs (attached, along with the modified base.cabal) which does some kludging to work around the fact that base is different for different impls. After a bit of digging I altered libraries/tools/convert_libraries to use a Setup.hs/Setup.lhs if it exists rather than always using packages/Cabal/examples/hapax.hs, but I now get: + ../../src/runhugs -98 Setup.hs configure --verbose --hugs --prefix=/asd --scratchdir=../../hugsdir/packages/base --with-hsc2hs=../../libraries/tools/hsc2hs --with-cpphs=../../libraries/tools/cpphs --with-compiler=../../src/ffihugs runhugs: Error occurred ERROR "./Data/List.hs" - Module "Data.List" already loaded so I am rather stuck. Thanks Ian